Thermodynamics Test

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Thermodynamics Test - 4

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Weekly Quiz Competition

Question 1
1 / -0

The spontaneous processes of nature are

A
dynamic

B
reversible

C
irreversible

D
static

Solution

Spontaneous processes are irreversible because they can be reversed only by taking a different path to get back to their original state. A reversible process can take the same path to return to its original state.
Question 2
1 / -0

The Carnot cycle consists of

A
Two isothermal processes connected by two isobaric processes

B
Two isochoric processes connected by two adiabatic processes

C
Two isothermal processes connected by two adiabatic processes

D
Two isobaric processes connected by two adiabatic processes
Solution
The Carnot cycle consists of the following four processes:
1. A reversible isothermal gas expansion process
2. A reversible adiabatic gas expansion process
3. A reversible isothermal gas compression process
4. A reversible adiabatic gas compression process
Question 3
1 / -0

Two cylinders A and B of equal capacity are connected to each other via a stopcock. A contains a gas at standard temperature and pressure. B is completely evacuated. The entire system is thermally insulated. The stopcock is suddenly opened. What is the final pressure of the gas in A and B?

A
0.45 atm

B
0.5 atm

C
0.6 atm

D
0.55 atm

Solution

PV = P_f.2V

P_f = V / 2V

P_f = 0.5P
Question 4
1 / -0

Two cylinders A and B of equal capacity are connected to each other via a stopcock. A contains a gas at standard temperature and pressure. B is completely evacuated. The entire system is thermally insulated. The stopcock is suddenly opened. What is the change in internal energy of the gas?

A
0.0 J

B
100 J

C
50 J

D
10 J

Solution

Internal energy depends on temperature and temperature remains constant because system is thermally insulated. so that change in internal energy will be zero.
Question 5
1 / -0

Two cylinders A and B of equal capacity are connected to each other via a stopcock. A contains a gas at standard temperature and pressure. B is completely evacuated. The entire system is thermally insulated. The stopcock is suddenly opened. What is the change in the temperature of the gas?

A
15^∘ C

B
-10^∘ C

C
0.0

D
10^∘ C

Solution

Temperature remains constant because system is thermally insulated. so that change in temperature will be zero.
Question 6
1 / -0

Two cylinders A and B of equal capacity are connected to each other via a stopcock. A contains a gas at standard temperature and pressure. B is completely evacuated. The entire system is thermally insulated. The stopcock is suddenly opened. Do the intermediate states of the system (before settling to the final equilibrium state) lie on its P-V-T surface?

A
yes

B
No

C
yes for points on the left

D
no for points on the left

Solution

Pressure and volume will be changed.

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Thermodynamics Test - 4

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Thermodynamics Test - 4

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Question 1

dynamic

reversible

irreversible

static

Solution

Question 2

Two isothermal processes connected by two isobaric processes

Two isochoric processes connected by two adiabatic processes

Two isothermal processes connected by two adiabatic processes

Two isobaric processes connected by two adiabatic processes

Solution

Question 3

0.45 atm

0.5 atm

0.6 atm

0.55 atm

Solution

Question 4

0.0 J

100 J

50 J

10 J

Solution

Question 5

15∘ C

-10∘ C

0.0

10∘ C

Solution

Question 6

yes

No

yes for points on the left

no for points on the left

Solution

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15^∘ C

-10^∘ C

10^∘ C