EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 17 - Thermodynamics>KEAM 2020>Q 2

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KEAM

IMPORTANT

Earn 100

If a monoatomic gas is compressed adiabatically to $(1 / 27)$ th of its initial volume, then its pressure becomes

66.67% studentsanswered this correctly

Important Questions on Thermodynamics

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KEAM

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 17 - Thermodynamics>KEAM 2018>Q 3

In a thermodynamic system,

Q

represents the energy transferred to or from a system by heat and

W

represents the energy transferred to or from a system by work

(I)

Q > 0

and

W = 0

(II)

Q < 0

and

W = 0

(III)

W > 0

and

Q = 0

(IV)

W < 0

and

Q = 0

Which of the above will lead to an increase in the internal energy of the system?

EASY

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IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 17 - Thermodynamics>KEAM 2018>Q 4

Five moles of an ideal monoatomic gas with an initial temperature of

150 ° C

expand and in the process absorb

1500 J

of heat and does

2500 J

of work. The final temperature of the gas in

° C

is (ideal gas constant,

R = 8.314 J K^{- 1} {mol}^{- 1}

).

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EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 17 - Thermodynamics>KEAM 2019>Q 5

A Carnot engine is operating between a hot body and cold body maintained at temperature $T_{1}$ and $T_{2}$ respectively. Consider the following three cases

Case I : The temperature of the hot body is changed to $T_{1} + Δ T$ and cold body is at $T_{2}$

Case II : The temperature of the hot body is at $T_{1}$ and cold body is changed to $T_{2} + Δ T$

Case III : The temperature of the hot body is

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EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 17 - Thermodynamics>KEAM 2018>Q 6

A Carnot engine whose low-temperature reservoir is at

350 K

has an efficiency of

50 %

. It is desired to increase this to

60 %

. If the temperature of the low-temperature reservoir remains constant, then the temperature of the high-temperature reservoir must be increased by how many degrees?