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 positive and is done to the system.
B. Work is positive and is done by the system.
C. Work is negative and is done to the system.
D. Work is negative and is done by the system.
Stacey Warren - Expert brainly.com
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When a gas expands against a pressure, then the system is doing work on the surroundings. I think you should take a look at the first law of thermodynamics to get a better understanding because this can be quite a tricky subject!
Okay, so which one do you think the answer is?
Well when work is done on a system, the internal energy is increased! Compressing a gas inside a thermally insulated container increases the internal energy of the gas.