Question

The ratio γ = Cp/Cv for a gas mixture consisting of 8 g of helium and 16 g of oxygen is .....

(a) \(\frac{23}{15}\)

(b) \(\frac{15}{23}\)

(c) \(\frac{27}{17}\)

(d) \(\frac{17}{27}\)

Answer 1

Correct answer is (c) 27/17

Number of moles of helium (n) = \(\frac{8}{4}\) = 2

Number of moles of oxygen (n') = \(\frac{16}{32}\) = \(\frac{1}{2}\)

in helium atom, C_v = \(\frac{3}{2}\)R