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    Entropy of an ideal gas

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    1) One mole of an ideal gas is changed from 273.15K and 2 atm to 233.15K and 0.4 atm. Calculate delta S for this change in state.

    2) Arrange the following chemicals in order of increasing entropy at STP.
    n - pentane (g)
    methanol ( l)
    ethanol (l)
    ethanol (g)

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    https://brainmass.com/chemistry/energetics-and-thermodynamics/entropy-ideal-gas-599217

    Solution Preview

    1. dS = Cpln(T2/T1) - Rln(P2/P1)

    We don't know what Cp is, it depends on the type of ideal gas. T2 ...

    Solution Summary

    The entropy equation for an ideal gas is given along with an ordering entropy problem.

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