A piece of aluminum has a volume of 1.4 10-3 m3. The coefficient of volume expansion

Question:

A piece of aluminum has a volume of 1.4 × 10-3 m3. The coefficient of volume expansion for aluminum is β = 69 × 10-6 (Co)-1. The temperature of this object is raised from 20 to 320 oC. How much work is done by the expanding aluminum if the air pressure is 1.01 × 105 Pa?