First slide

Specific heat

Question

The ratio (C_P/ C_V) of the specific heats at a constant pressure and constant volume of any perfect gas

Moderate

A

cannot be greater than 5/4
B

cannot be greater than 3/2
C

cannot be greater than 5/3
D

can have any value

Solution

$C_{V} = \frac{3}{2} R and C_{p} = (\frac{5}{2}) R$
$∴ \frac{C_{p}}{C_{v}} = \frac{(5 / 2) R}{(3 / 2) R} = \frac{5}{3}$

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