"Evaporation and intermolecular forces" Essays and Research Papers

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    Dry Ice And Evaporation

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    Have you ever seen dry ice‚ well let me show you. To measure the evaporation rate it is important to know that a half pound of dry ice will be placed outside and timed. The same thing will happen but in a cool room. If the dry ice is -109.3°F then it will evaporate in any condition warmer. The hypotheses is that the dry ice in the outside will evaporation faster. It is important to understand this because if you are trying to store dry ice and you put it in a freezer it will still evaporate. So in

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    Evaporation Lab Report

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    Parts Observations 1 Evaporation Both the water and alcohol felt cool on the wrist. The water felt cooler at first‚ then the alcohol started evaporating faster and it felt cooler. The alcohol drew heat from the body as it’s evaporating thus creating a greater heat loss and temperature change. 3 Skin Prints Different areas of the skin have different skin prints. A fingerprint has a loop design‚ whereas the skin print of a palm is straight and linear. The lines of a wrist print are interconnected

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    Technique of Water Evaporation   Introduction When water evaporates from water storages it becomes a major issue that affects regions of agriculture in most lands leading to annual loss exceeding potentially to 40 precent and more of water storage. This water which is lost leads to reduction of productivity in agriculture affecting the environment adversely. Literature review has been developed on the same by various researchers in order to develop evaporation suppression techniques

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    My hypothesis is that if I turn the water to vapor then I will be able to determine the ratio and the amount of moles of the salt and water. This is because by using evaporation I will be able to learn the mass of the salt and of the water needed for n=m/MM which states the amount of moles can be found by dividing mass of the moles by the molar mass. Experiment 1 First I took a crucible‚ a balance‚ and a Bunsen burner and placed them onto the workbench. Then I measured the mass of the empty crucible

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    Vapor Pressure and Heat of Vaporization Introduction: ​Evaporation is the process of a liquid becoming vaporized. When a liquid is placed into a confined space some of the liquids will evaporate. Evaporation of the liquid depends on the strength of the intermolecular forces that are between liquid molecules. During the evaporation process of the liquid‚ new gas molecules exerts pressure in the sealed container‚ while some of the gas condenses back to the liquid state. ​If the temperature inside

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    Extraction and Evaporation: Separating the Components of "Panacetin" Submitted- July 17‚ 2012 Introduction The purpose of this lab is to investigate the composition of a compound suspected to be Panacetin‚ a type of pain-killer. Panacetin is typically made up of sucrose‚ aspirin‚ and acetaminophen‚ but the third component in this experiment is unknown. The unknown component is suspected to be a chemical relative of acetaminophen‚ either acetanilide or phenacetin. Using techniques such as

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    (1) Evaporation: Surface Area: Evaporation is surface phenomenon.Greater is surface area greater is evaporation and vice versa.For example‚ sometimes a saucer is used if tea is to be cooled‚ quickly.This is because evaporation from the larger surface area of saucer is more than that of the smaller surface area of the tea cup. Temperature: At high temperature‚ rate of evaporation is high because at high temperature

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    Determine the missing properties and the phase descriptions in the following table for water. Show all your intermediate work. No 1 2 3 4 5 6 7 8 9 10 190 100 280 400 7000 600 2000 2963.7 Saturated Liquid 60 1750 375 300 4893.1 1800 T (oC) P (kPa) h(kJ/kg) 275 4.00 0.0 Saturated Vapor v(m3/kg) u(kJ/kg) x (quality) Phase description 0.7 Question 2: (20 points) An insulated‚ vertical piston–cylinder device initially contains 10 kg of water‚ 5 kg of which is in the vapor phase. The mass of the

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    Chemistry IA How does the molecular mass of alcohols affect its rate of evaporation? Introduction Alcohols are some of the most important molecules in organic chemistry. They can be converted into many different types of compounds. Alcohols contain the hydroxyl functional group (-OH)‚ bonded to a carbon atom of an alkyl or substituted alkyl group. The weight of the different compounds will differs because of the amount of hydrogen bonding. There are three kind of alcohols‚ primary‚ secondary

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    Subject:Experiment # 2: Extraction and Evaporation. Separating the Components of “Panacetin” Introduction: The problem proposed in the experiment is an unknown ingredient found in generic Panacetin tablets that must be discovered. Panacetin tablets are known to contain aspirin‚ acetaminophen‚ and sucrose; therefore‚ the tablets tested‚ containing aspirin and sucrose‚ are thought to contain an unknown of something similar to that of acetaminophen such as acetanilide or phenacetin. Another problem

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