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Q.

An ideal gas is enclosed in a cylinder with a movable piston on top. The piston has mass of 8000g and an area of 5.00cm2 and is free to slide up and down, keeping the pressure of the gas constant. How much work is done as the temperature of 0.200mol of the gas is raised from 200°C to 300°C ?

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a

346.2J

b

276.2J

c

635.2J

d

166.2J

answer is D.

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Detailed Solution

pV=nRT

  pΔV=nRΔT

Work done under constant pressure is

W=pΔV=nRΔT

=(0.2)(8.31)(100)

=166.2J

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