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JEE Main 2011 Physics question

PhysicsKinetic Theory of GasesJEE Main 2011

Three perfect gases at absolute temperatures , and are mixed. The masses of molecules are , and and the number of molecules are , and respectively. Assuming no loss of energy, the final temperature of the mixture is :

Answer: (1)

Solution

Each molecule's average energy is proportional to T (same degrees of freedom assumed); total energy is

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Question ID VK-039303