JEE Main 2022 · 30 Jun · Shift 1 · Physics Q41

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PhysicsSingle correct+4 / -1Question 41 of 90

A sample of monoatomic gas is taken at initial pressure of 75 kPa. The volume of the gas is then compressed from 1200 cm $^3$ to 150 cm $^3$ adiabatically. In this process, the value of workdone on the gas will be :

79 J

405 J

4050 J

9590 J

Answer and worked solution

Official answer: B

Final pressure. $75\times8^{5/3}=2400$ kPa.

Work on gas. $\dfrac{P_2V_2-P_1V_1}{\gamma-1}=\dfrac{360-90}{2/3}=405$ J.

(B)

Topics:Thermodynamic processes Work done by a gas

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JEE Main 2022 · 30 Jun · Shift 1, Physics question 41