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Q.

Five moles of hydrogen is heated through 20 K under constant pressure. If R=8.312 J/mol  K  find the external work done.

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a

831.2 J

b

83.12 J

c

166.24 J

d

16.62 J

answer is A.

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Detailed Solution

Given n=5, dT=20K , P=constant , R=8.312J/mole K External work done (dW) = PdV=nRdT  =5×8.312×20=831.2J
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Five moles of hydrogen is heated through 20 K under constant pressure. If R=8.312 J/mol  K  find the external work done.