At a certain temperature, the degrees of freedom per molecule for gas is 8. The gas performs 150 J at work when it expands under constant pressure. The amount of heat absorbed by the gas will be________J.

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    Answered by

    Vishal Baghel | Contributor-Level 10

    2 months ago

    Degree of freedom, f = 8

    CV=82R=4RandCP=4R+R=5R

    So, H = ΔU+W

    at constant pressure, W = PΔv

    150 = nRΔT

    So,  H=nCVΔT=n5RΔT=5 (nRΔT)

    = 5 × 150

    = 750 J

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