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NEET levelSingle correct optionDifficulty 1 of 3td168

Two moles of an ideal gas are heated from $300 K$ to $350 K$ at constant pressure. Taking $R = 8.314 J mo l^{- 1} K^{- 1}$ , the magnitude of work done by the gas is nearest to

A $416 J$
B $831 J$
C $4988 J$
D $1247 J$

Answer: B

At constant pressure

∣ w ∣ = P Δ V = n R Δ T

. So

∣ w ∣ = 2 \times 8.314 \times 50 = 831.4 J

, about

831 J

.

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