Kinetic Theory

JEE Main level, single correct, medium

165 of 168

Question 165 of 168

An insulated container of gas has two chambers separated by an insulating partition. One of the chambers has volume V1V_1 and contains ideal gas at pressure P1P_1 and temperature T1T_1. The other chamber has volume V2V_2 and contains ideal gas at pressure P2P_2 and temperature T2T_2. If the partition is removed without doing any work on the gas, the final equilibrium temperature of the gas in the container will be

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Answer: (A) T1T2(P1V1+P2V2)P1V1T2+P2V2T1\frac{T_1 T_2\left(P_1 V_1+P_2 V_2\right)}{P_1 V_1 T_2+P_2 V_2 T_1}

U=U1+U2T=(P1V1+P2V2)T1T2(P1V1T2+P2V2T1)\begin{aligned} & U=U_1+U_2 \\ & T=\frac{\left(P_1 V_1+P_2 V_2\right) T_1 T_2}{\left(P_1 V_1 T_2+P_2 V_2 T_1\right)} \end{aligned}

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