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Q.

3 moles of a gas requires 60 cal of heat energy for 5oC rise of temperature at constant volume. Then heat energy required for 5 moles of the same gas under constant pressure for 10oC rise of temperature is (universal gas constant = 2 cal mol-1 oC-1)

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a

300 cal 

b

200 cal

c

400 cal

d

100 cal 

answer is D.

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Detailed Solution

heat required at constant volume =nCvdt

3 Cv5=60 ;Cv=4

Cp=6  

heat required at constant pressure=nCPdt

5×6×10=300 cal

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