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Question: Answered & Verified by Expert
3 mole of hydrogen is mixed with 1 mole of neon. The molar specific heat at constant pressure is
PhysicsExperimental PhysicsAIIMSAIIMS 2014
Options:
  • A $\frac{9 R}{4}$
  • B $\frac{9 R}{2}$
  • C $\frac{13 R}{4}$
  • D $\frac{13 R}{2}$
Solution:
2056 Upvotes Verified Answer
The correct answer is: $\frac{13 R}{4}$
For mixture, $C_V=\frac{n_1 C_{V_1}+n_2 C_{V_2}}{n_1+n_2}$
$=\frac{3 \times \frac{5}{2} R+1 \times \frac{3}{2} R}{3+1}=\frac{9 R}{4}$
$C_P=C_V+R=\frac{9 R}{4}+R=\frac{13 R}{4}$

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