540 calories of heat convert 1 cubic centimeter of water at 100oC into 1671 cubic centimeter of steam at 100oC at a pressure of one atmosphere. Then the work done against the atmospheric pressure is nearly
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a
540 cal
b
40 cal
c
Zero cal
d
500 cal
answer is B.
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Detailed Solution
Amount of heat given =540 caloriesChange in volume ΔV=1670 c.cAtmospheric pressure P=1.01×106 dyne/cm2Work done against atmospheric pressure =1.01×106×16704.2×107≈40 cal