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CGP EDU Academic Team
Published on: September 12, 2026
540 calories of heat convert 1 cubic centimeter of water at $100^\circ \mathrm{C}$ into 1671 cubic centimeter of steam at $100^{\circ}C$ at a pressure of one atmosphere. Then the work done against the atmospheric pressure is nearly
Text Solution
Verified by ExpertsThe correct answer is:
B
Amount of heat given = 540 calories
Change in volume $\Delta V = 1670 \text{ c.c}$
Atmospheric pressure $P = 1.01 \times 10^{6} \text{ dyne/cm}^{2}$
Work done against atmospheric pressure
$W = P \Delta V = \frac{1.01 \times 10^{6} \times 1670}{4.2 \times 10^{7}} \approx 40 \text{ cal}$
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