AP EAPCET 2025 - 23rd May Evening Shift | Heat and Thermodynamics Question 24 | Physics

If the internal energy of 3 moles of a gas at a temperature of $27^{\circ} \mathrm{C}$ is 2250 R , then the number of degrees of freedom of the gas is

( $R=$ Universal gas constant)

AP EAPCET 2025 - 23rd May Morning Shift

MCQ (Single Correct Answer)

-0

Steam at $100^{\circ} \mathrm{C}$ is passed into 114 g of water at $30^o$ The mass of water present in the mixture when the temperature of the water becomes $70^{\circ} \mathrm{C}$ is (Latent heat of steam $=540 \mathrm{cal} \mathrm{g}^{-1}$, Specific heat capacity of water $=1 \mathrm{cal} \mathrm{g}^{-1}{ }^{\circ} \mathrm{C}^{-1}$ )

122 g

132 g

142 g

152 g

AP EAPCET 2025 - 23rd May Morning Shift

MCQ (Single Correct Answer)

-0

In a Carnot engine if the work done during isothermal expansion is $25 \%$ more than the work done during isothermal compression, then the efficiency of the engine is

$10 \%$

$15 \%$

$20 \%$

$25 \%$

AP EAPCET 2025 - 23rd May Morning Shift

MCQ (Single Correct Answer)

-0

The work done to increase the volume of 2 moles of an ideal gas from V to 2 V at a constant temperature $T$ is W . The work to be done to increase the volume of 2 moles of the same gas from 2 V to 4 V at the same constant temperature $T$ is

0.5 W

2 W

4 W

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