E M B I B E

Physics Crash Course JEE Main>Chapter 10 - Thermodynamics>Level 1>Q 13

EASY

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IMPORTANT

Earn 100

The first law of thermodynamics is a special case of,

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Important Questions on Thermodynamics

EASY

JEE Main

IMPORTANT

Physics Crash Course JEE Main>Chapter 10 - Thermodynamics>Level 1>Q 14

An ideal gas undergoes the cyclic process

abca

as shown in the figure. The internal energy change of the gas along the path

c a

is

- 180 J

. The gas absorb

250 J

of heat along the path

a b

and also absorbs

60 J

of heat along the path

bc

. Find the work done by the gas along the path

a b c

EASY

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IMPORTANT

Physics Crash Course JEE Main>Chapter 10 - Thermodynamics>Level 1>Q 15

A given quantity of gas is taken from the state $A$ to the state $C$ reversibly by two paths, $A \to C$ directly and $A \to B \to C$ as shown in the figure below:

Question Image

During the process $A \to C$ , work done by the gas is $100 J$ and heat absorbed is $120 J$ . If during the process $A \to B \to C$ , the work done by the gas is $80 J$ , the heat absorbed is

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Physics Crash Course JEE Main>Chapter 10 - Thermodynamics>Level 1>Q 20

Four moles of hydrogen, two moles of helium and one mole of water vapor form an ideal gas mixture. What is the molar specific heat at constant pressure of mixture?

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IMPORTANT

Physics Crash Course JEE Main>Chapter 10 - Thermodynamics>Level 1>Q 21

For a diatomic gas, change in internal energies per unit change in temperature for constant pressure and volume are

U_{1}

and

U_{2}

, respectively. Then

U_{1} : U_{2}

is

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IMPORTANT

Physics Crash Course JEE Main>Chapter 10 - Thermodynamics>Level 1>Q 22

Find the work done by the gas in the process shown in figure.

Question Image

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IMPORTANT

Physics Crash Course JEE Main>Chapter 10 - Thermodynamics>Level 1>Q 23

An ideal gas is taken through a cyclic thermodynamic process through four steps. The amount of heat involved in these steps are

Q_{1} = 5960 J, Q_{2} = - 5585 J, Q_{3} = - 2980 J

and

Q_{4} = 3645 J

, respectively. The corresponding work involved are

W_{1} = 2200 J, W_{2} = - 825 J, W_{3} = - 1100 J

and

W_{4}

, respectively. The value of

W_{4}

is

EASY

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IMPORTANT

Physics Crash Course JEE Main>Chapter 10 - Thermodynamics>Level 1>Q 24

A gas at state $A$ changes to state $B$ through path $I$ and $II$ shown in figure. The change in internal energy is $Δ U_{1}$ and $Δ U_{2}$ , respectively. Then