AP EAPCET 2024 - 22th May Evening Shift | Heat and Thermodynamics Question 57 | Physics

The total internal energy of 2 moles of a monoatomic gas at a temperature $27^{\circ} \mathrm{C}$ is $U$. The total internal energy of 3 moles of a diatomic gas at a temperature $127^{\circ} \mathrm{C}$ is

$U$

$\frac{10 U}{3}$

2 U

$\frac{2 U}{3}$

AP EAPCET 2024 - 22th May Morning Shift

MCQ (Single Correct Answer)

-0

A metal ball of mass 100 g at $20^{\circ} \mathrm{C}$ is dropped in 200 g of water at $80^{\circ} \mathrm{C}$. If the resultant temperature is $70^{\circ} \mathrm{C}$, then the ratio of specific heat of the metal to that of water is

$\frac{5}{2}$

$\frac{1}{2}$

$\frac{2}{5}$

$\frac{2}{1}$

AP EAPCET 2024 - 22th May Morning Shift

MCQ (Single Correct Answer)

-0

The efficiency of a heat engine that works between the temperatures where Celsius-Fahrenheit scales coincides and Kelvin-Fahrenheit scales coincides is (approximately)

$45 \%$

$35 \%$

$60 \%$

$50 \%$

AP EAPCET 2024 - 22th May Morning Shift

MCQ (Single Correct Answer)

-0

Initially the pressure of 1 mole of an ideal gas is $10^5 \mathrm{Nm}^{-2}$ and its volume is 16 L . When it is adiabatically compressed, its final volume is 2 L . Work-done on the gas is

$\left[\right.$ molar specific heat at constant volume $\left.=\frac{3}{2} R\right]$

72 kJ

7.2 kJ

720 kJ

360 kJ

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