Q: For a gas, the difference between the two principal specific heats is 4150 J/kg K. What is the specific heat of the gas at constant volume if the ratio of specific heats is 1.4 ?
(a) 5186 J/kg K
(b) 10375 J/kg K
(c) 1660 J/kg K
(d) 8475 J/kg K
Ans:(b)
Sol: Cp-Cv = 4150
Cp/Cv = 1.4,
Cp = 1.4 Cv
1.4 Cv – Cv = 4150
0.4 Cv = 4150
Cv = 4150/0.4
= 10375 J/kg K