A2L Item 112
- Description: Indicate the sign of the work done on a gas during an isobaric compression process.
- Goal: Hone the concept of work on a gas
- Source: UMPERG-ctqpe220
- Keywords: Graphing, Thermodynamics, Work
The question for students:
One mole of an ideal monatomic gas is taken around the cycle shown.
The work done on the system during the process B to C is
- Positive
- Negative
- No work is done on the system
- Cannot be determined
Commentary for teachers:
Answer
(1) Positive work is done ON the system. Since the path on a V-T diagram is a straight line, the process is isobaric.