Which of the following would increase the volume of a gas?

A. Chilling a can of soda

B. Heating a hot-air balloon

C. Squeezing a balloon

D. Pressurizing an air tank

According to Ideal Gas Equation, Volume is related to Pressure and Temperature as follow,

P V = n R T

Or,

V = n R T / P

This relation shows that Volume is directly related to Temperature and Inversely related to pressure. So,

A. Chilling a can of soda: As temperature is decreased so the volume will also decrease.

B. Heating a hot-air balloon: As temperature is increased, so Volume will also increase.

C. Squeezing a balloon: As pressure is applied, so volume will decrease.

D. Pressurizing an air tank: Again pressure is applied so volume will decrease.