1. The problem statement, all variables and given/known data When 1380 J of heat are added to one mole of an ideal monatomic gas, its temperature increases from 272 K to 275 K. Find the work done by the gas during this process. 2. Relevant equations I assume [tex]\Delta[/tex]U = Q - W is the formula to use. But for some reason I'm just confused. 3. The attempt at a solution I tried using 1380 = 275 - W, and got -1105. But that is not the correct answer.