An ideal gas initially in state 1 progresses to a final state by one of three different processes (a, b, or c). Each of the possible final states has the same temperature.

For which process is the change in internal energy larger?

1. a
2. b
3. c
4. Equal for all three
5. Not enough information is given to answer this question

Because the change in temperature is the same the change in internal energy is the same for all three processes.

For which process is more heat transferred into the ideal gas?

1. a
2. b
3. c
4. Equal for all three
5. Not enough information is given to answer this question

By looking at the areas under the curves for each process you can see that more work is done for process c. Q = the change in internal energy + work, so Q is largest for process c.