First slide

Different type of processes

Question

One mole of ideal gas expands isobarically to double its volume at 27°C. Then the work done by the gas is nearly

Moderate

A

2760 cal
B

414 cal
C

1380 cal
D

600 cal

Solution

If volume is doubled, temperature is also doubled at constant pressure
$\begin{aligned} W & = PdV = nRdT \\ = 1 \times 2 \times 300 \\ = 600 cal \end{aligned}$

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