During an isothermal expansion, a confined ideal gas does -150J agaisnt its surroundings. Which of the following describes the heat transfer during this process?
A 150J of Heat was added to the gas
B 150J of Heat was removed from the gas
C 300J of Heat was added to the gas
D 300J of Heat was removed from the gas
E No heat
U = Q + W
In isothermal expansion, Q = -W
The Attempt at a Solution
For this multiple choice problem, I thought the answer would be B. This is becaise the gas does -150J of work agaisnt its surroundings. This means that the surrounding did 150J of work into the gas. Thus, I would expect that if we Followed Q = -W, that 150J of heat was removed from the gas. However, the answer is (A).