# CHM 130 Rio Salado College Gases and Gas Laws Problem Set

Lesson 11 Problem Set
Gases and Gas Laws
Name ___________________________
CHM130 – Section number __________
Directions:
On the Problem Sets, information is missing as it is variable information. Your instructor will
provide the values in the Message Center, in the “From Your Instructor” section of the lesson, or
answer the questions. Show all work and use appropriate labels and units. Be sure to highlight
the final answer. Be sure to write VERY neatly or better yet, type out all the work and answers
1. Convert the following pressure units as instructed. Be sure to show all your work with units in
a.
Convert 823 mmHg to kPa.
b.
Convert 2.3 atm to Pa.
2. Complete the following gas law problems. Your Instructor will provide the values to use. Be sure
to show all your work with units in your work. (6 points each).
a.
What would be the new pressure, in mmHg, if ____ cm3 of gas at standard pressure is
compressed to a volume of ____ cm3? (Temperature and amount of moles is held constant)
b.
A ____ mL sample of gas has a temperature of ____˚C and a pressure of ____atm. What
temperature would be needed for the same amount of gas to fit into a ____ mL flask at
standard pressure? (Amount of moles is held constant)
c.
The pressure in a bicycle tire is ____psi at ____˚C in Phoenix. You take the bicycle up to
Flagstaff, where the temperature is ____˚C. What is the pressure, in kPa, in the tire?
(Volume and Amount of moles is held constant)
3. Solve the following ideal gas law problems. Your Instructor will provide some of the values to
use. Be sure to show all your work with units in your work. (8 points each)
a.
What volume would be occupied by ____ mol of a gas at ____ oC with a pressure of
____ kPa?
b.
What pressure is exerted by 2.68 g of He gas contained in a 9.22 L vessel at 16 oC?
4. Using stoichiometry, solve the following gas problem. Your Instructor will provide the value to
use. Be sure to show all your work with units in your work. (8 points each)
Using the equation below, determine the volume (in liters) of CO 2 that is produced from
_____ L of O 2 at STP.
2C 2 H 6 (s) + 7O 2 (g) → 6H 2 O(l) + 4CO 2 (g)

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