Question

Name Lab Partner Lab Section PRELABORATORY EXERCISE Date 1 Complete each sentence below. a According to Charles' Law, the volume and temperature of a foued amount of gas are proportional at constant pressure. b When applying Charles' Law, the gas temperature must be expressed in c Unlike solids and liquids, the Cu b etween gas particles are essentially nonexistent 2 Read the procedure for this experiment carefully and provide the following information. a Name the gas or gas mixture that is the subject of the experiment. b Give the approximate Celsius temperature value you should expect to measure when the gas is heated. c Give the approximate Celsius temperature value you should expect to measure when the gas is chilled. d Name the piece of glassware that will serve as the experimental chamber to hold the gas. Give the approximate volume you should expect to measure for the gas when it is heated f Should the volume you measure for the gas when it is chilled be greater or less than the volume of the experimental chamber? 3 If a balloon holds 4.5 L of gas at 25°C, what will be the volume of the balloon at 38°C? Assume that pressure is held constant. Show your work. Lab 14 - Charles Law

Answer 1

According to Charles law , the volume and temperature of fixed amount of gas are directly proportional at constant pressure.

When applying Charles law , the gas temperature must be expressed in Kelvin units.

Unlike solids and liquids, the attractive forces between gas particles are essentially non-existant

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Q3). According to Charles law: V1/T1 = V2/T2 where V1 and V2 are volumes and T1 and T2 are temperatures in Kelvin units.

In this problem, V1 = 4.5 L, T1 = 25+273=298 K and T2 = 273+38 = 311 K

Hence, V2/311 = 4.5/298

V2 = 311 x 4.5/298 = 4.7 L