Question

Two moles of an ideal gas with C_P/C_V = 5/3 are mixed with 3 moles of another ideal gas with C_P/C_V = 4/3. The value of C_P/C_V for the mixture is: 

(1) 1.50 

(2) 1.42 

(3) 1.45 

(4) 1.47

Answer 1

Answer is (2) 1.42

Comments

gooood

Answer 2

Answer is (2) 1.42

on rearranging,

we get