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:

Option A. Number of moles of first gas …

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Heat and Thermodynamics

JEE Main 2011 · Annual, Paper 1 · Q7289

PhysicsMedium251×since 2002Q7289

Three perfect gases at absolute temperatures

{T_1},\,{T_2}

and

{T_3}

are mixed. The masses of molecules are

{m_1},{m_2}

and

{m_3}

and the number of molecules are

{n_1},

{n_2}

and

{n_3}

respectively. Assuming no loss of energy, the final temperature of the mixture is: