Under constant pressure, a system of gases is sealed in a cylinder and then allowed to expand. What can you conclude about the work associated with this change?

A. Work is negative and is done to the system.
B. Work is negative and is done by the system.
C. Work is positive and is done to the system.
D. Work is positive and is done by the system.

Correct answer is work is negative and done by the system.

Ok everyone seems to be getting confused on this question. There are two versions and everyone is getting mad at other people who are answering the other question. The first one, 'Under constant pressure, a system of gases is sealed in a cylinder and then compressed. What can you conclude about the work associated with this change?'

The answer to this question is "Work is positive and is done to the system"
The other question is 'Under constant pressure, a system of gases is sealed in a cylinder and then allowed to expand. What can you conclude about the work associated with this change?'

The answer to this variation is "Work is negative and is done by the system"

Explanation: Taking AP Chem through APEX in 2020

There is a very similar question which sheperd answer and is correct.

Expand is work is negative and done by the system.
Compress is work is positive and done to system

What happens to the volume? If there is no volume change there is no work done. If the volume increases, then the system has done work to the outside and work is negative.

For the variation of this question which is 'compressed' instead of 'expanded' the answer is the work is positive and done to the system.

Work is negative and is done by the system. I just took the quiz.

work is positive and done to system, John is wrong. i just did the quiz

Old question, but I just want to make sure the correct answer is given.

Work when being compressed in negative and when being expanded is positive. When work is negative it is being done TO the system and when positive is being done BY the system.

So the correct answer is that work is negative and is done to the system.

Work is positive and done by the system

D. Work is positive and is done by the system.