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In a process on a system, the initial pressure and volume are equal to the final pressure and volume.

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Important Questions on Thermodynamics

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Physics

IMPORTANT

Physics Crash Course JEE Advanced>Chapter 12 - Thermodynamics>Exercise 1>Q 43

A system undergoes a cyclic process in which it absorbs

Q_{1}

heat and gives out

Q_{2}

heat. The efficiency of the process is

η

and work done is

W

. Select correct statement.

EASY

Physics

IMPORTANT

Physics Crash Course JEE Advanced>Chapter 12 - Thermodynamics>Exercise 1>Q 44

When a system is taken from state $i$ to state $f$ along the path $iaf$ , it is found that $Q = 50 cal$ and $W = 20 cal$ . Along the path $ibf$ $Q = 36 cal$ , then work (in $cal$ ) along the path $ibf$ is-

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EASY

Physics

IMPORTANT

Physics Crash Course JEE Advanced>Chapter 12 - Thermodynamics>Exercise 1>Q 45

Consider

R

to be the universal gas constant. Given that, the amount of heat needed to raise the temperature of

2 m o l e s

of an ideal monatomic gas from

273 K

373 K

when no work is done is

n \times R

. Then

n

HARD

Physics

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Physics Crash Course JEE Advanced>Chapter 12 - Thermodynamics>Exercise 1>Q 46

The radius and surface tension of a spherical soap bubble be

r

and

T

respectively. Find the charge required which is to be given to the bubble so that its radius will become

2 r

in equilibrium. Here atmospheric pressure is

P_{0},

temperature of the air inside the bubble remains constant & the charge is assumed to uniformly distributed on the surface of the bubble. Find the value of

\frac{Q}{96 π \times 10^{- 10}}

(in

C

). Take

P_{0} = 10^{2} Pa, T = 0.07 N m^{- 1}, r = 1 cm, ε_{0} = 9 \times 10^{- 12} C^{2} N m^{- 2} .

MEDIUM

Physics

IMPORTANT

Physics Crash Course JEE Advanced>Chapter 12 - Thermodynamics>Exercise 1>Q 47

32 g

O_{2}

is contained in a cubical container of side

1 m

and maintained at a temperature of

127 ° C

. The isothermal bulk modulus of elasticity of the gas in terms of universal gas constant

R

a R

. Find the value of

a

HARD

Physics

IMPORTANT

Physics Crash Course JEE Advanced>Chapter 12 - Thermodynamics>Exercise 1>Q 48

An ideal gas

(\frac{C_{p}}{C_{v}} = γ)

is taken through a process in which the pressure and the volume vary such that

P = α V^{β}

. The value of

β

, for which molar heat capacity of gas is zero, is

n γ

. Value of

n

, is

HARD

Physics

IMPORTANT

Physics Crash Course JEE Advanced>Chapter 12 - Thermodynamics>Exercise 1>Q 49

An ideal monoatomic gas undergoes a process such that its internal energy relates to the volume as

U = a \sqrt{V}

, where

a

is a constant. Molar specific heat of the gas is

n R .

Value of

n,

HARD

Physics

IMPORTANT

Physics Crash Course JEE Advanced>Chapter 12 - Thermodynamics>Exercise 1>Q 50

Two moles of a diatomic ideal gas is taken through a process,

P = \frac{α}{T}

, where

α

is a positive constant. Temperature of gas is increased from

T_{0}

2 T_{0}

, work done by the gas is

N R T_{0}

. Value of

N

, is

In a process on a system, the initial pressure and volume are equal to the final pressure and volume.

Important Questions on Thermodynamics

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