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
  • A$\frac{{{n_1}^2{T_1}^2 + {n_2}^2{T_2}^2 + {n_3}^2{T_3}^2}}{{{n_1}{T_1} + {n_2}{T_2} + {n_3}{T_3}}}$
  • B$\frac{{{T_1} + {T_2} + {T_3}}}{3}$
  • C$\;\frac{{{n_1}{T_1} + {n_2}{T_2} + {n_3}{T_3}}}{{{n_1} + {n_2} + {n_3}}}$
  • D$\;\frac{{{n_1}{T_1}^2 + {n_2}{T_2}^2 + {n_3}{T_3}^2}}{{{n_1}{T_1} + {n_2}{T_2} + {n_3}{T_3}}}$
AIEEE 2011, Medium
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