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

MEDIUM

KEAM

IMPORTANT

Earn 100

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?

50% studentsanswered this correctly

Important Questions on Thermodynamics

EASY

KEAM

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}

).

MEDIUM

KEAM

IMPORTANT

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

MEDIUM

KEAM

IMPORTANT

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?