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A certain mass of gas is taken from an initial thermodynamics state $A$ to another state $B$ by process I and II. In process I for the gas does $5 J$ of work and absorbs $4 J$ of heat energy. In process II, the gas absorbs $5 J$ of heat. The work done by the gas in process II is

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Important Questions on Thermodynamics

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PHYSICS FOR JOINT ENTRANCE EXAMINATION WAVES AND THERMODYNAMICS>Chapter 4 - Thermodynamics>Exercises>Q 2

A vessel contains helium, which expands at constant pressure when

15 k J

of heat is supplied to it. The variation of the internal energy of the gas (in

k J

) will be

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PHYSICS FOR JOINT ENTRANCE EXAMINATION WAVES AND THERMODYNAMICS>Chapter 4 - Thermodynamics>Exercises>Q 3

A vessel of volume

0.2 m^{3}

contains hydrogen gas at temperature

300 K

and pressure

1 b a r

. The molar heat capacity of hydrogen at constant volume is

5 cal / molK

. The heat (in

kcal

) required to raise the temperature to

400 K

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PHYSICS FOR JOINT ENTRANCE EXAMINATION WAVES AND THERMODYNAMICS>Chapter 4 - Thermodynamics>Exercises>Q 4

P - V

diagram of a diatomic gas is plotted, it is a straight line passing through the origin. The molar heat capacity of the gas in the process is

n R

where

n

is an integer. The value of

n

HARD

Physics

IMPORTANT

PHYSICS FOR JOINT ENTRANCE EXAMINATION WAVES AND THERMODYNAMICS>Chapter 4 - Thermodynamics>Exercises>Q 5

The value of

γ = \frac{C_{p}}{C_{V}}

\frac{4}{3}

for an adiabatic process of an ideal gas for which internal energy

U = K + n P V

. The value of

n

(

K

is a constant) is

HARD

Physics

IMPORTANT

PHYSICS FOR JOINT ENTRANCE EXAMINATION WAVES AND THERMODYNAMICS>Chapter 4 - Thermodynamics>Exercises>Q 6

One mole of a monatomic ideal gas follows a process $A \to B$ , as shown. The specific heat of the process is $\frac{13 R}{6}$ . The value of $n$ on $P$ -axis (see following figure) is

Question Image

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PHYSICS FOR JOINT ENTRANCE EXAMINATION WAVES AND THERMODYNAMICS>Chapter 4 - Thermodynamics>Exercises>Q 7

Heat

Q = \frac{3}{2} R T

is supplied to

4 moles

of an ideal diatomic gas at temperature

T

, which remains constant. Number of moles of the gas dissolved into atoms is

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PHYSICS FOR JOINT ENTRANCE EXAMINATION WAVES AND THERMODYNAMICS>Chapter 4 - Thermodynamics>Exercises>Q 8

A gaseous mixture enclosed in a vessel contains

1 g

mole of a gas

A

(with

γ = 5 / 3

) and another gas

B

(with

γ = 7 / 5

) at a temperature

T

. The gases

A

and

B

do not react with each other and are assumed to be ideal. The number of gram moles of

B

γ

for the gaseous mixture is

19 / 13

is:

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PHYSICS FOR JOINT ENTRANCE EXAMINATION WAVES AND THERMODYNAMICS>Chapter 4 - Thermodynamics>Exercises>Q 9

Calculate the heat absorbed by a system in going through the cyclic process shown in the given figure.

(Take $π = 3.14$ )

Question Image

A certain mass of gas is taken from an initial thermodynamics state A to another state B by process I and II. In process I for the gas does 5 J of work and absorbs 4 J of heat energy. In process II, the gas absorbs 5 J of heat. The work done by the gas in process II is

Important Questions on Thermodynamics

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A certain mass of gas is taken from an initial thermodynamics state $A$ to another state $B$ by process I and II. In process I for the gas does $5 J$ of work and absorbs $4 J$ of heat energy. In process II, the gas absorbs $5 J$ of heat. The work done by the gas in process II is