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Chemistry: The Combined Gas Law KEY Solve the following problems. As always, include enough work and show the units to ensure full credit. 1. The pressure of a gas changes from 120 kPa to 50 kPa. The volume changes from 45 L to 40 L. If the initial temperature is 81oC, what is the final temperature in oC? T 81 C 273o 354 K T x K
A sample of nitrogen occupies a volume of 250 rnL at 25 oc. What volume will it occupy at 95 oc? Oxygen gas is at a temperature of 40 oc when it occupies a volume of 2.30 Liters. To what temperature should it be raised to occupy a volume of 6.50 Liters? Hydrogen gas was cooled from 150 oc to 50 QC. Its new volume is 75.0 ml.. What was its original
What volume will the gas occupy at STP? At a certain temperature, molecules of methane gas, CH4 have an average velocity of 0.098 m/s. What is the average velocity of carbon dioxide molecules at this same temperature? Find the relative rate of diffusion for the gases chlorine, Cl2 and ethane, C2H6.
Use your knowledge of the ideal and combined gas laws to solve the following problems. If it involves moles or grams, it must be PV = nRT. 1) If four moles of a gas at a pressure of 5.4 atmospheres have a volume of 120 liters, what is the temperature? 1973 K.
A sample of gas has an initial volume of 25 L and an initial pressure of 3.5 atm. If the pressure changes to 1.3 atm, find the new volume, assuming that the temperature remains constant.
The volume of a gas varies linearly with the number of moles: V = kA × n kA is Avogadro’s gas constant. • These are unified in the ideal gas law: PV = nRT R is the universal gas constant. Critical thinking questions. 1. Sketch on the graph below how the volume of a gas changes as the pressure is increased. V. P. 2.
Chemistry: The Ideal Gas Law Directions: Solve each of the following problems. Show your work, including proper units, to earn full credit. 1. If 3.7 moles of propane are at a temperature of 28oC and are under 154.2 kPa of pressure, what volume does the sample occupy? 2.
