A system changes from the state $\left(P_{1}, V_{1}ight)$ to $\left(P_{2}ight.$ $\mathrm{V}_{2}$ ) as shown…

A system changes from the state $\left(P_{1}, V_{1}ight)$ to $\left(P_{2}ight.$ $\mathrm{V}_{2}$ ) as shown in the figure. What is the work done by the system?

1. $7.5 \times 10^{5}$ joule
2. $7.5 \times 10^{5}$ erg
3. $12 \times 10^{5}$ joule
4. $6 \times 10^{5}$ joule

Solution

$\mathrm{W}=\mathrm{W}_{1}+\mathrm{W}_{2}$
$=4 \times 1 \times 10^{5}+1 / 2 \times 4 \times 10^{5} \times 4$
$=12 \times 10^{5}$ Joule
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Asked in: JEE-TOPICTESTS-CHEMISTRY

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