1. The problem statement, all variables and given/known data A mass of 3 mole gas is heated in a constant pressure of 1.5 atm, expanding from 40 litre to 60 litre. Find the temperature growth. 2. Relevant equations V1/V2=T1/T2. 3. The attempt at a solution I thought to write V1/V2=T1/T2. But I don't know T1. The answer is 121 K in my book.