Heat, Work, and Internal Energy in Thermodynamic Processes

When a gas is compressed rapidly ΔU is
1. Positive
2. Negative
3. Zero
When a gas expands rapidly ΔU is
1. Positive
2. Negative
3. Zero
If heat goes in and W = 0, then ΔU is
1. Positive
2. Negative
3. Zero
If heat is drawn out and W = 0, then ΔU is
1. Positive
2. Negative
3. Zero
If the volume of the gas increases and Q = 0, then ΔU is
1. Positive
2. Negative
3. Zero
If the volume of the gas decreases and Q = 0, then ΔU is
1. Positive
2. Negative
3. Zero
If the gas does work on its surroundings and Q = 0, then ΔU is
1. Positive
2. Negative
3. Zero
If the gas has work done on it and Q = 0, then ΔU is
1. Positive
2. Negative
3. Zero
When negative work is done by the gas and Q = 0, then ΔU is
1. Positive
2. Negative
3. Zero
When positive work is done by the gas and Q = 0, then ΔU is
1. Positive
2. Negative
3. Zero
During an isothermal process ΔU is
1. Positive
2. Negative
3. Zero
If heat is added during an isovolumetric process, then ΔU is
1. Positive
2. Negative
3. Zero
If heat is removed during an isovolumetric process, then ΔU is
1. Positive
2. Negative
3. Zero
During an adiabatic compression of a gas ΔU is
1. Positive
2. Negative
3. Zero
During an adiabatic expansion of a gas ΔU is
1. Positive
2. Negative
3. Zero
During an isovolumetric process W is
1. Positive
2. Negative
3. Zero
When a gas is compressed the work done by the gas is
1. Positive
2. Negative
3. Zero
When a gas expands the work done by the gas is
1. Positive
2. Negative
3. Zero
Q = 0, but temperature increases, therefore the work done by the gas is
1. Positive
2. Negative
3. Zero
Q = 0, but temperature decreases, therefore the work done by the gas was
1. Positive
2. Negative
3. Zero
If Q is positive during an isothermal process the work done by the gas must be
1. Positive
2. Negative
3. Zero
If Q is negative during an isothermal process, the work done by the gas must be
1. Positive
2. Negative
3. Zero
If the volume of the gas increases and P is constant, then the work done by the gas is
1. Positive
2. Negative
3. Zero
If the volume of the gas decreases (P is constant), then the work done by the gas is
1. Positive
2. Negative
3. Zero
If the gas is compressed in an adiabatic process, then Q is
1. Positive
2. Negative
3. Zero
If the gas expands in an adiabatic process, Q is
1. Positive
2. Negative
3. Zero
If the gas expands in an isothermal process, Q is
1. Positive
2. Negative
3. Zero
If the gas is compressed in an isothermal process, Q must be
1. Positive
2. Negative
3. Zero
If ΔU is positive in an isovolumetric process then Q must be
1. Positive
2. Negative
3. Zero
If ΔU is negative in an isovolumetric process, then Q must be
1. Positive
2. Negative
3. Zero
If ΔU = 0 and the gas expands, then Q is
1. Positive
2. Negative
3. Zero
If ΔU = 0 and the gas is compressed, Q is
1. Positive
2. Negative
3. Zero
If ΔU is negative then ΔT is
1. Positive
2. Negative
3. Zero
If ΔU is positive then ΔT is
1. Positive
2. Negative
3. Zero
For the gas, W is negative and Q = 0. Therefore T is
1. Positive
2. Negative
3. Zero
For the gas, W is positive and Q = 0. Therefore T is
1. Positive
2. Negative
3. Zero