Question

A diatomic gas does does 130j of work when it is expanded isobarically,find the heat given to the gas in the process

Answer 1

Explanation:

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Answer 2

Answer:ΔQ=455J

Explanation:

Correct option is C)

it is given that W=80J

from ideal gas equation

PΔV=nRΔT

∵W=PΔT

ΔT= 130/nR ..........(1)

Change in internal energy is given by the relation as follows

ΔU=nCvΔT

=nRΔT /γ−1..........(2)

Here, diatomic gas is given so γ= 7/5

​Equation (2) becomes

ΔU= nRΔT/(2/5)

= 5nR× 130/(2nR)

=325J

The heat given to the gas during this process is

ΔQ=ΔU+W

ΔQ=325+130

ΔQ=455J

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