[SOLVED] Internal Energy and Heat 1. The problem statement, all variables and given/known data Ten joules of heat energy are transferred to a sample of an ideal gas at constant temperature. As a result, the internal energy of the gas: a) increases by 10 J b) increases by less than 10 J c) increases by more than 10 J d) remains unchanged 2. Relevant equations delta U = Q + W 3. The attempt at a solution I thought the internal energy of the gas remains unchanged since internal energy is proportional to absolute temperature and the temperature remains the same. Can anybody confirm this please?