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Q.

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

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a

831.2 J   

b

83.12J

c

166.24 J   

d

16.62J

answer is A.

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Detailed Solution

n = 5mole ; ΔT = 20k ;  R = 8.312J/mol-K

∆W=P∆V=nR∆T

∆W=5×8.312×20 J=831.2 J

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