Two moles of helium are mixed with n moles of hydrogen. If C p C v = 3 2 for the mixture then the value of n is,

Step-by-step solution

γ mix = 1 + 2 f mix C p C v =   f m i x + 2 f m i x = 3 2 ⇒       f m i x = 4 f m i x =   n 1 f 1 +   n f 2 n 1 +   n 2 ⇒ 4 = 2 × 3 + n × 5 2 + n ⇒ n = 2   mole