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An ideal gas is allowed to expand both reversibly and irreversibly in an isolated system. If $T_{1}$ is the initial temperature and $T_{f}$ is the final temperature, which of the following statements is correct?

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Important Questions on Thermodynamics

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Achieve Indian Airforce Agniveer Vayu Physics Practice Book>Chapter 12 - Thermodynamics>Exercise>Q 1

A Carnot engine works between constant temperature

T_{1}

and

T_{2}

of source and sink, respectively. For efficiency to be greatest

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Achieve Indian Airforce Agniveer Vayu Physics Practice Book>Chapter 12 - Thermodynamics>Exercise>Q 2

Two carnot engines

A

and

B

are operated in series. The first one,

A,

receives heat at

T_{1} (= 600 K)

and rejects to a reservoir at temperature

T_{2} .

The second engine

B

receives heat rejected by the first engine and, in turn, rejects to a heat reservoir at

T_{3} (= 400 K) .

Calculate the temperature

T_{2}

if the work outputs of the two engines are equal:

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Achieve Indian Airforce Agniveer Vayu Physics Practice Book>Chapter 12 - Thermodynamics>Exercise>Q 3

A reversible engine converts one-sixth of the heat input into work. When the temperature of the sink is reduced by

62^{o} C

, the efficiency of the engine is doubled. The temperatures of the source and sink are

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Achieve Indian Airforce Agniveer Vayu Physics Practice Book>Chapter 12 - Thermodynamics>Exercise>Q 4

A Carnot engine takes 300 calories of heat from a source at

500 K

and rejects

150

calories of heat to the sink. The temperature of the sink is

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Achieve Indian Airforce Agniveer Vayu Physics Practice Book>Chapter 12 - Thermodynamics>Exercise>Q 5

A given mass of a gas expands from state

A

B

by three different paths

1

2

and

3

as shown in the diagram. If

W_{1}

W_{2}

and

W_{3}

respectively be the work done by the gas along three paths, then

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Achieve Indian Airforce Agniveer Vayu Physics Practice Book>Chapter 12 - Thermodynamics>Exercise>Q 6

Two carnot engine are connected in series and output work of both engine is same. If temperature of source of

1^{s t}

engine is

600 K

and temperature of sink of

2^{n d}

engine is

400 K .

The temperature of junction will be

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Achieve Indian Airforce Agniveer Vayu Physics Practice Book>Chapter 12 - Thermodynamics>Exercise>Q 7

A certain engine which operates in a carnot cycle absorbs

3.347 k J

400 ° C

, how much work is done by the engine per cycle? The temperature of sink is

100 ° C

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Achieve Indian Airforce Agniveer Vayu Physics Practice Book>Chapter 12 - Thermodynamics>Exercise>Q 8

A carnot engine working between

300 K

and

600 K

has work output of

800 J {cycle}^{- 1}

. What is the amount of heat energy supplied to the engine from source per cycle

An ideal gas is allowed to expand both reversibly and irreversibly in an isolated system. If T1 is the initial temperature and Tf is the final temperature, which of the following statements is correct?

Important Questions on Thermodynamics

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An ideal gas is allowed to expand both reversibly and irreversibly in an isolated system. If $T_{1}$ is the initial temperature and $T_{f}$ is the final temperature, which of the following statements is correct?