First slide

Different type of processes

Question

Two moles of a diatomic ideal gas is expanded isothermally to twice its original volume. If temperature of the gas is $27^{o} C$ and $R = 8.3 \frac{Joule}{K-mol}$ , the heat supplied to the gas is Given $l_{n 2} = 0.693$

Moderate

A

14.72 J
B

18.62 J
C

11.5 J
D

8.75 J

Solution

$Q = Δ U + W = 0 + n R T l_{n} \frac{V_{2}}{V_{1}} = 2 \times 8.3 \times 300 l_{n 2} J$
$\Rightarrow Q = 2 \times 8.3 \times 0.693 J = 11.5 J$

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