Chapter 18, Problem 5E

You have a gas at 25°C confined to a cylinder with a movable piston. Which od the following actions would double the gas pressure?
a. Lifting on the piston to double the volume while keeping the temperature constant;
b. Heating the gas so the its temperature rises from 25°C to 50°C, while keeping the volume constant;
c. Pushing down on the piston to halve the volume while keeping the temperature constant.