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One Mole of Helium Gas Expands Adiabatically from 2 Atm °\degree

Question 38

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One mole of helium gas expands adiabatically from 2 atm pressure to 1 atm pressure.If the original temperature of the gas is 20 °\degree C,what is the final temperature of the gas? ( γ\gamma = 1.67)

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