A gas is compressed isothermally to half its initial volume. The same gas is compressed separately through an adiabatic process until its volume is again reduced to half. Then

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Important Questions on Thermodynamics

MEDIUM

JEE Main

IMPORTANT

Physics Crash Course JEE Main>Chapter 10 - Thermodynamics>Level 2>Q 14

A monatomic gas at a pressure $P$ , having a volume $V$ expands isothermally to a volume $2 V$ and then adiabatically to a volume $16 V$ . The final pressure of the gas is (take $γ = \frac{5}{3}$ )

MEDIUM

JEE Main

IMPORTANT

Physics Crash Course JEE Main>Chapter 10 - Thermodynamics>Level 2>Q 15

One gram-mole of an ideal gas

A

with the ratio of constant pressure and constant volume specific heats,

γ_{A} = \frac{5}{3}

is mixed with

n

gram-moles of another ideal gas

B

with

γ_{B} = \frac{7}{5}

. If the

γ

for the mixture is

\frac{19}{13}

what will be the value of

n ?

MEDIUM

JEE Main

IMPORTANT

Physics Crash Course JEE Main>Chapter 10 - Thermodynamics>Level 2>Q 16

A gas mixture consists of 2 moles of oxygen and 4 moles of argon at temperature T. Neglecting all vibrational modes, the total internal energy of the system is:

HARD

JEE Main

IMPORTANT

Physics Crash Course JEE Main>Chapter 10 - Thermodynamics>Level 2>Q 17

A monoatomic ideal gas, initially at temperature $T_{1}$ , is enclosed in a cylinder fitted with a frictionless piston. The gas is allowed to expand adiabatically to a temperature $T_{2}$ by releasing the piston suddenly. If $L_{1}$ and $L_{2}$ are the lengths of the gas column before and after expansion respectively, then $\frac{T_{1}}{T_{2}}$ is given by

HARD

JEE Main

IMPORTANT

Physics Crash Course JEE Main>Chapter 10 - Thermodynamics>Level 2>Q 18

A gas expands adiabatically, such that its temperature