The specific heat of air at constant pressure is 1.05kj//kg K and the specific heat of air at constant voume is `0.718 KJ//kgK`. Find this specific gas constant.

Options

A. 0.287 kJ/kgK
B. 0.21 kJ/kgK
C. 0.34 kJ/kg K
D. 0.19 kJ/kg K

Answer

A

Explanation

`dQ=dU+PdV=dU+p(0)=dU`
`((dQ)/(dT))_(v)=(dU)/(dT)`