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Question:

A gas mixture contains one mole O2 gas and one mole He gas. Find the ratio of specific heat at constant pressure to that at constant volume of the gaseous mixture.

2.5

2

1.5

4

Solution:

Formula for CV for a mixture is:

nTCVT = n1CV1 + n2CV2
CVT = (5R/2) + (3R/2) / 2 = 2R
CPT = CVT + R = 3R
Thus, ratio = 1.5
Hence, the correct option is B