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[GET] Evaporation And Intermolecular Attractions Lab Report Answers
Volta's pile was at first a technical curiosity but this new electrochemical phenomenon very quickly opened the door to new branches of both physics and chemistry and a myriad of discoveries, inventions and applications. The electronics, computers...[FREE] Evaporation And Intermolecular Attractions Lab Report Answers | latest
For many years the telegraph, and later the telephone, industries were the only consumers of batteries in modest volumes and it wasn't until the twentieth century that new applications created the demand that made the battery a commodity item. In...
- The ancient city of Babylon which served for nearly two millennia as a center of Mesopotamian civilization is located about 60 miles kilometers south of Baghdad in modern-day Iraq. See Map of Mesopotamia. Unfortunately this accolade ignores the contributions of the Chinese people and the Harappans of the Indus Valley, Modern day Pakistan who were equally "civilised" during this period practicing metallurgy copper, bronze, lead, and tin and urban planning, with civic buildings, baked brick houses, and water supply and drainage systems. From around B. Called Cuneiform Writing from the Latin "cuneus", meaning "wedge", it was developed as a vehicle for commercial accounting transactions and record keeping. The writing was in the form of a series of wedge-shaped signs pressed into soft clay by means of a reed stylus to create simple pictures, or pictograms, each representing an object.
- The clay subsequently hardened in the Sun or was baked to form permanent tablets. By B. For the first time news and ideas could be carried to distant places without having to rely on a messenger's memory and integrity. Hieroglyphic script evolved slightly later in Egypt. Though the script appeared on vases and stone carvings, many important Egyptian historical scripts and records were written in ink, made from carbon black soot or red ochre mixed with gelatin and gum, applied with a reed pen onto papyrus.
- Produced from the freshwater papyrus reed, the papyrus scrolls were fragile and susceptible to decay from both moisture and excessive dryness and many of them have thus been lost, whereas the older, more durable clay cuneiform tablets from Mesopotamia have survived. Historians seem to agree that the wheel and axle were invented around B. Pictograms on a tablet dating from about B. Evidence from Ur indicates that the simpler potter's wheel probably predates the use of the axled wheel for transport because of the difficulty in designing a reliable mechanism for mounting the rotating wheel on a fixed hub or a rotating axle on the fixed load carrying platform. Sumerian mathematics and science used a base 60 sexagesimal numeral system. The Mesopotamians thus introduced the minute hour, the second minute and the degree circle with each angular degree consisting of 60 seconds. The calendar adopted by the Sumerians, Babylonians and Assyrians was based 12 lunar months and seven-day weeks with hour days.
- Since the average lunar month is To keep the calendar aligned to the seasons they added seven extra months in each period of 19 years, equivalent to the way we add an extra day in leap years. Despite decimalisation, we still use these sexagesimal measures today. The Mesopotamians discovered glass, probably from glass beads in the slag resulting from experiments with refining metallic ores. They were also active in the development of many other technologies such as textile weaving, locks and canals, flood control, water storage and irrigation. There are also claims that the Archimedes' Screw may have been invented in Mesopotamia and used for the water systems at the Hanging Gardens of Babylon. Sometimes known as the "Second oldest profession", soldering has been known since the Bronze Age Circa to B. A form of soldering to join sheets of gold was known to be used by the Mesopotamians in Ur. Egypt was also home to Imhotep the first man of science in recorded history. He was the world's first named architect and administrator who around B.
Intermolecular Forces: Evaporation And Intermolecular Attractions
Papyri were unearthed in the nineteenth century dating from around B. The first outlines surgical treatments for various wounds and diseases and the second contains prescriptions and recipes for treating a variety of medical conditions making Imhotep the world's first recorded physician. Other contemporary papyri described Egyptian mathematics. Egyptian teachings provided the foundation of Greek science and although Imhotep's teachings were known to the Greeks, years after his death, they assigned the honour of Father of Medicine to Hippocrates. The earliest evidence of the art of stencilling used by the Egyptians. Designs were cut into a sheet of papyrus and pigments were applied through the apertures with a brush.- The technique was reputed to have been in use in China around the same time but no artifacts remain. The Xia dynasty in China perfected the casting of bronze for the production of weapons and ritual wine and food vessels, reaching new heights during the Shang dynasty B. Circa B. The process for making wrought iron was discovered by the Hittites, in Northern Mesopotamia and Southern Anatolia now part of Eastern Turkey , who heated iron ore in a charcoal fire and hammered the results into wrought worked iron. See more about wrought iron B. Fine wire also made by the Egyptians by beating gold sheet and cutting it into strips. Recorded in the Bible, Book of Exodus, Chapter 39, Verse 3, - "And they did beat the gold into thin plates, and cut it into wires, to work it.
- Around this date, after his escape from Egypt, Moses ordered the construction of the Ark of the Covenant to house the tablets of stone on which were written the original "Ten Commandments". Its construction is described in great detail in the book of Exodus and according to the Bible and Jewish legend it was endowed with miraculous powers including emitting sparks and fire and striking dead Aaron's sons and others who touched it. It was basically a wooden box of acacia wood lined with gold and also overlaid on the outside with gold. The lid was decorated with two "cherubim" with outstretched wings. In Nikola Tesla , in an essay entitled "The Fairy Tale of Electricity" promoting the appreciation of electrical developments, proposed what seemed a plausible explanation for some of the magical powers of the Ark.
- He claimed that the gold sheaths separated by the dry acacia wood effectively formed a large capacitor on which a static electrical charge could be built up by friction from the curtains around the Ark and this accounted for the sparks and the electrocution of Aaron's sons. Recent calculations have shown however that the capacitance of the box would be in the order of pico farads and such a capacitor would need to be charged to , volts to store even 1 joule of electrical energy, not nearly enough to cause electrocution.
- It seems Tesla's explanation was appropriately named. The magnetic properties of the naturally occurring lodestone were first mentioned in Greek texts. Also called magnetite, lodestone is a magnetic oxide of iron Fe3O4 which was mined in the province of Magnesia in Thessaly from where the magnet gets its name. Lodestone was also known in China at that time where it was known as "love stone" and is in fact quite common throughout the world. Surprisingly although they were aware of its magnetic properties, neither the Greeks nor the Romans seem to have discovered its directive property. Eight hundred years later in 77 A. In it, he attributed the name "magnet" to the supposed discoverer of lodestone, the shepherd Magnes, "the nails of whose shoes and the tip of whose staff stuck fast in a magnetic field while he pastured his flocks".
- Thus another myth was born. Pliny was killed during the volcanic eruption of Mount Vesuvius near Pompeii in A. The Greek philosopher and scientist, Thales of Miletus B. He travelled to Egypt and the city state of Babylon in Mesopotamia now modern day Iraq and is said to have brought Babylonian mathematics back to Greece. The following rules are attributed to him: Any angle inscribed in a semicircle is a right angle. Known as the Theorem of Thales it was however known to the Babylonians years earlier. A circle is bisected by any diameter. The base angles of an isosceles triangle are equal. The opposite angles formed by two intersecting lines are equal. Two triangles are congruent equal shape and size if two angles and a side are equal. The sides of similar triangles are proportional Using the concept of similar triangles he was able to calculate the height of pyramids by comparing the size of their shadows with smaller, similar triangles of known dimensions.
- Similarly he calculated the distance to ships at sea by noting the azimuth angle of the ship from a baseline of two widely spaced observation points a known distance apart on the shore and scaling up the distance to the ship from the dimensions of a smaller similar triangle. In this way he was able to calculate the distance to far off objects without measuring the distance directly, the basis of modern surveying. Thales also demonstrated the effect of static electricity by picking up small items with an amber rod made of fossilised resin which had been rubbed with a cloth. He also noted that iron was attracted to lodestone. Thales left no writings and knowledge of him is derived from an account in Aristotle 's Metaphysics written nearly years later and itself subject to numerous subsequent copies and translations.
- Pythagoras of Samos B. Like Thales , he had travelled to Egypt and Babylon where he studied astronomy and geometry. His theorem. His cult-like followers, were enthralled by numbers such as prime numbers and irrational numbers and considered their work to be secret and mystical. See examples of The Divine Proportion. None of Pythagoras writings have survived and knowledge of his life and works is based on tradition rather than verified facts. Cast iron was produced for the first time by the Chinese during the Zhou dynasty B. Prior to that, it had not been possible to raise the temperature of the ore sufficiently to melt the iron and the only available iron was wrought iron created by heating iron ore in a furnace with carbon as the reducing agent and hammering the resulting spongy iron output.
- By a combination of the addition of phosphorus to the ore which reduced its melting point, the use of a bellows to pump air through the ore to aid the exothermic reduction process and the use of improved high temperature refractory bricks forming the walls of the furnace to withstand the heat, the Chinese were able to melt the iron and cast it into functional shapes ranging from tools and pots and pans to heavy load bearing constructional members as well as fine ornamental pieces. Cast iron was not produced in Europe till around A.
- The stronger the IMFs, the higher the boiling and melting point of a compound. The decrease in mass is related to the strength of the intermolecular forces of attraction. Intermolecular forces are weak relative to intramolecular forces — the forces which hold a molecule together. Observe the samples and compare the strength of the dispersion forces between the molecules.
Lab - Evaporation And Inter Molecular Attractions | Intermolecular Force | Ethanol
Women's History Activator: Eleanor Roosevelt. Polar molecules have London dispersion forces in addition to dipole forces. Intermolecular Forces Lab Answers - examentop. Physical properties and intermolecular forces. Defining Gravity. Intermolecular forces IMF or secondary forces are the forces which mediate interaction between molecules, including forces of attraction or repulsion which act between atoms and other types of neighboring particles, e. Intermolecular Forces Lab Pdf. Ninth grade. The types of intermolecular forces that occur in a substance will affect its physical properties, such as its … We believe that the main principle of this experiment is to thoroughly understand the different variations of intermolecular forces of attraction. Have the learners research the safety data for various compounds, especially those being used in the experiments in this section, as a way of linking the properties of organic molecules with their molecular structure.. All of the questions in this simulation, however, use molecules … The forces between covalent compounds are relatively weak, so covalent molecules tend to have low boiling and melting points.- In order to determine this strength difference, one must first understand what intermolecular forces … Read Free Intermolecular Forces Flinn Lab Answers - examentop. The forces between covalent compounds are relatively weak, so covalent molecules tend to have low boiling and melting points. Intermolecular Forces … … SWBAT explain how physical properties at the macroscale can be used to compare the strength of intermolecular forces at the nanoscale. Consider the strength of the forces We have been asked to design a lab that compares the strength of intermolecular forces among these organic molecules: - acetone - 1-propanol - 2-propanol - 1-butanol - n-hexane Obviously you can't boil these organic molecules above a bunsen burner, so I thought of doing an evaporation test, but everyone else seems to be boiling it?
- Consider the strength of the forces the kinetic molecular theory properties of gases video. Learning Targets: I can classify the type of intermolecular forces hydrogen bonding, dipole-dipole interaction, and London dispersion forces present in covalent molecules. Big Idea. Predict the molecular shape of each of the following: a. CCl 4 c. BrF d. PCl 5 2. Where To Download Intermolecular Forces Lab Answers Intermolecular Forces Lab Answers This is likewise one of the factors by obtaining the soft documents of this intermolecular forces lab answers by online. Raymond Stadt. Comparing the Strength of Intermolecular Forces Lab. They include London dispersion forces, dipole interactions, and hydrogen bonds. Intermolecular forces affect many properties of compounds, such as vapor pressure and boiling point. As this intermolecular forces lab answers, it ends happening swine one of the favored books intermolecular forces lab answers collections that we have. If the forces between molecules are very weak, then the material may be a gas, and it may be … Intermolecular forces lab pdf 08 imf purpose the report rosalielaconto of electrons increases, so there is a higher chance of electron … Comparing Dipole-Dipole to London Dispersion For Students 9th - 12th Standards.
- Lesson Author. Sign In Contact Us. The structure of a compound can influence the formation and strength of intermolecular forces. So, if we are comparing several non-polar molecules to each other, we expect the largest ones with the most electrons to have strongest London dispersion forces. Evaporation is the process of converting a substance from the liquid phase to the gas phase.
- Intermolecular forces are the attractive and repulsive forces between two distinct compounds or molecules. Videos Mapped to Your Course. It is an endothermic process, since energy is required to overcome the attraction that a liquid molecule feels for its … How to paint a watercolor and ink flower Dipole forces are … The different types of intermolecular attractions are: dispersion London forces, dipole-induced dipole interactions, ion-induced dipole interactions, dipole-dipole interactions, and hydrogen bonding.
- This is true when comparing molecules of similar size, but there are ranges for each type of intermolecular force. Letter on sample State phase of sample Relative strength of intermolecular forces Draw a structural formula for each of the … acids and … Sign In Contact Us. Other Resource Types 22 Lesson Planet. What temperature that is depends on the strength and type of forces between the molecules and ions. The physical properties that are directly influenced by the strength of intermolecular force of attraction is the boiling point or, melting point of the substance. The strength of the dispersion force increases with the number of electrons in the molecule, which is the molecular weight.
Which Of These Substances Has The Strongest Intermolecular Forces
Authors Librarians About. Intermolecular Forces are forces that act between molecules rather than Interamolecular Forces which act within a molecule. I can infer the relative strength of intermolecular forces based on observations of physical properties. You might not require more become old to spend to go to the books foundation as skillfully as search for them. Using technology to explain how boiling point, melting point, volatility, surface tension and viscosity are measures of intermolecular forces while absent. List all types of IMFs that would occur in each of the following you should have a good enough understanding of electronegativities to answer all of these, except … Introduction: In this experiment, six substances were tested in various ways to determine the strength of the intermolecular forces between them.- Station 2 — comparing molecules with only dispersion or London forces. Grade Level. The strength of such intermolecular forces and the energy of motion available to the sample based on the temperature , together dictate the physical state of a substance. We found 22 reviewed resources for intermolecular forces lab.
Intermolecular Forces: Evaporation And Intermolecular Attractions - Chemistry 2 - Stuvia
This is why you remain in the best website to look the amazing ebook to have. Home; Mail; News; Sports; … the kinetic molecular theory properties of gases video. With increasing molar mass, the no. As noted in the introduction on London dispersion forces, the larger the molecule is, the more electrons it has, which gives it a larger temporary, or instantaneous, dipole and stronger dispersion forces.Lab Investigation 1 - Why Do Liquids Evaporate At Different Rates?
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Intermolecular And Interatomic Forces | Intermolecular Forces | Siyavula
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