Question

If CP and CV denoted the specific heats of unit mass of nitrogen at constant pressure and volume respectively, then

• A. CP – CV = $\frac{R}{28}$
• B. CP – CV = $\frac{R}{7}$
• C. CP – CV = $\frac{R}{14}$
• D. CP – CV =

Answer 1

Answer: (A)

CP – CV = $\frac{R}{28}$

Answer 2

Using Mayers equation, for 1 mole of gas,

$C_{P} - C_{V} = R$

$\therefore$For unit mass, $C_{P} - C_{V} = \frac{R}{M} = \frac{R}{28}$

($\because$M for nitrogen = 28)