Three perfect gases at absolute temperature T 1 , T 2 and T 3 are mixed. The masses of…

Physics · JEE Main · NTA ExamsKinetic Theory of Gases

Three perfect gases at absolute temperature T1, T2 and T3 are mixed. The masses of molecules are m1, m2 and m3 and the number of moles are n1, n2 and n3 respectively. Assuming no loss of energy, the final temperature of the mixture is
  1. \(\frac{n_{1} T_{1}+n_{2} T_{2}+n_{3} T_{3}}{n_{1}+n_{2}+n_{3}}\)
  2. \(\frac{n_{1} T_{1}^{2}+n_{2} T_{2}^{2}+n_{3} T_{3}^{2}}{n_{1} T_{1}+n_{2} T_{2}+n_{3} T_{3}}\)
  3. \(\frac{n_{1}^{2} T_{1}^{2}+n_{2}^{2} T_{2}^{2}+n_{3}^{2} T_{3}^{2}}{n_{1} T_{1}+n_{2} T_{2}+n_{3} T_{3}}\)
  4. \(\frac{\left(T_{1}+T_{2}+T_{3}\right)}{3}\)

Answer

(A) n_ 1 T_ 1 +n_ 2 T_ 2 +n_ 3 T_ 3 n_ 1 +n_ 2 +n_ 3

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