PV Diagrams 2

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For process AB above, ΔU is:
1. +
2. −
3. 0
In process AB above, W by the gas is:
1. +
2. −
3. 0
In process DA above, W by the gas is:
1. +
2. −
3. 0
The above graph shows the cycle of a heat engine. Which area shows the net work done by the heat engine during one cycle?
1. Area I
2. Area II
3. Area I + Area II
For process DA above, Q is:
1. +
2. −
3. 0
In process DA above, ΔU is:
1. +
2. −
3. 0
The above graph shows the cycle of a heat engine. If the engine were more efficiency how should CD change?
1. It should move higher (up)
2. It should move lower (down)
3. Neither would change the efficiency
For process AB above, Q is:
1. +
2. −
3. 0
In process DA above, W by the gas is:
1. +
2. −
3. 0
The above graph shows the cycle of a heat engine. Which area shows the work done by the engine to recompress the piston?
1. Area I
2. Area II
3. Area I + Area II
The above graph shows the cycle of a heat engine. Which area shows the total work done by the gas as it pushes agains the piston?
1. Area I
2. Area II
3. Area I + Area II
The above graph shows the cycle of a heat engine. Which area shows the energy lost by the heat engine during one complete cycle?
1. Area I
2. Area II
3. Area I + Area II
For process AB above, the W on the gas is:
1. +
2. −
3. 0
In process BC above, the W done on the system is:
1. +
2. −
3. 0
In process AB above, Q is:
1. +
2. −
3. 0
In process DA above, Q is:
1. +
2. −
3. 0
How does ΔU change during one complete cycle (ABCD and back to A)?
1. ΔU = + (total energy increases)
2. ΔU = − (total energy decreases)
3. ΔU = 0 (total energy stays the same)
In process DA above, ΔU is:
1. +
2. −
3. 0
In process AB above, ΔU is:
1. +
2. −
3. 0
For process DA above, the W on the gas is:
1. +
2. −
3. 0
In process AB above, the W on the gas is:
1. +
2. −
3. 0