Solve the following problem:
Problem: 3.0 moles of an ideal gas expands isothermally from a volume of 20 L to 50 L while its temperature is 300 K.
Question I: Is work done by the gas or on the gas?
By the gas?
On the gas?
No work is done?
Question 2: What is the magnitude of the work?
Please explain clearly with details so that I can follow. Thanks.