Free Printable 2.1.8 pV Graphs

1.

$What\ is\ the\ sign\ ofthe\ \Delta U?$

a)

positive

b)

negative

c)

zero

d)

Can't tell from this diagram

2.

$What\ is\ the\ sign\ of\ \Delta U?$

a)

postive

b)

negative

c)

zero

d)

Can't tell from this PV diagram.

3.

$What\ is\ the\ sign\ of\ W_{ }for\ the\ gas?$

a)

positive

b)

negative

c)

zero

d)

Can't tell from this diagram

4.

An ideal gas undergoes a cyclic process as shown on the graph above of pressure P versus volume V.

During which process is no work done on or by the gas?

a)

AB

b)

BC

c)

CD

d)

DE

e)

EA

5.

An ideal gas undergoes a cyclic process as shown on the graph above of pressure P versus volume V.

At which point is the gas at its highest temperature?

a)

A

b)

B

c)

C

d)

D

e)

E

6.

A gas is taken from state i to state f along the two-step process shown in the PV diagram above.

How much work is done on the gas during the process described?

a)

0 J

b)

2,000 J

c)

4,000 J

d)

8,000 J

e)

16,000 J

7.

A gas is taken from state i to state f along the two-step process shown in the PV diagram above.

What is the ratio Tf / Ti of the temperature of state f to the temperature of state i?

a)

1

b)

4/3

c)

3/2

d)

2

e)

4

8.

1200 J of heat are added to a sample of gas while the gas does 400 J of work on the environment. What is the change in internal energy of the gas?

a)

800 J

b)

1600 J

c)

-800 J

d)

-1600 J

9.

During process A, from state 1 to state 2, the temperature of the ideal gas

a)

stays the same

b)

increases

c)

decreases

d)

is half as much

10.

If the temperature of a gas increases and the gas has done work, then...

a)

there must be heat added to the gas

b)

the gas must be giving off heat to the environment.

c)

this is an adiabatic process.

d)

there must be less heat added than the work done on the gas.

11.

During process D, from state 4 to state 1, the ideal gas...

a)

is increasing temperature.

b)

is doing work on the environment.

c)

is decreasing pressure.

d)

is decreasing temperature.

12.

For the process Y→Z, Q is greater than zero and

a)

W<0 and ΔU=0

b)

W=0 and ΔU<0

c)

W=0 and ΔU>0

d)

W >0 and ΔU=0

e)

W>0 and ΔU>0

13.

For the process X→Y, ΔU is greater than zero and

a)

Q<0 and W = 0

b)

Q<0 and W>0

c)

Q>0 and W<0

d)

Q>0 and W=0

e)

Q>0 and W>0

14.

A certain quantity of an ideal gas initially at temperature T₀, pressure p₀, and volume V₀ is compressed to one-half its initial volume. As shown above, the process may be adiabatic (process 1), isothermal (process 2), or isobaric (process 3).

Which of the following is true of the mechanical work done on the gas?

a)

It is greatest for process 1.

b)

It is greatest for process 3.

c)

It is the same for processes 1 and 2 and less for process 3.

d)

It is the same for processes 2 and 3 and less for process 1.

e)

It is the same for all three processes.

15.

A certain quantity of an ideal gas initially at temperature T₀, pressure p₀, and volume V₀ is compressed to one-half its initial volume. As shown above, the process may be adiabatic (process 1), isothermal (process 2), or isobaric (process 3).

Which of the following is true of the final temperature of this gas?

a)

It is greatest for process 1.

b)

It is greatest for process 2.

c)

It is greatest for process 3.

d)

It is the same for processes 1 and 2.

e)

It is the same for processes 1 and 3.

16.

A monatomic ideal gas is initially in state A, as shown in the PV diagram above. The gas undergoes a transition from state A by the three different processes shown, where process III is isothermal.

Positive work is performed on the gas in which of the following processes?

a)

I only

b)

III only

c)

I and II only

d)

II and III only

e)

I, II, and III

17.

A sample of an ideal gas can be taken from state i to state f via two processes, as shown in the above graph of pressure P versus volume V. In one process the gas goes through state X, and in the other process the gas goes through state Y. Which of the following will be the same for both processes? Select two answers.

a)

The change in the internal energy of the gas

b)

The temperature of the gas at the end of the process

c)

The thermal energy transferred to the gas by heating

d)

The work done on the gas

18.

Identical samples of gas initially have pressure P₀ , volume V₀, and temperature T₀. In some experiments, students take samples through each of the processes shown in the graph above. The final temperature is equal to the initial temperature for which of the processes? Select two answers

a)

A

b)

B

c)

C

d)

D

19.

Which of the following features of the graph shown below represents the net work done during the complete thermodynamic cycle ABCA?

a)

the slope of the line BC

b)

the area under the line AB

c)

the area bound by triangle ABCA

d)

the average slope of the lines AB, BC, and CA

2.1.8 pV Graphs

Total questions: 19

Worksheet time: 17mins

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