First slide

Thermodynamic processes

Question

For the given P-V graph of a diatomic gas find the molar heat capacity of the gas in the process.

Moderate

A

3R
B

4R
C

7R
D

2R

Solution

$P α V$
$P V^{- 1} = K$
$\to$ Its poly topic process then n=1
$\to$ For diatomic process r=1.4
Molar heat capacity
$C = \frac{R}{1.4 - 1} + \frac{R}{1 + 1} = 3 R$
$C = 3 R$

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