What is the entropy change associated with the expansion of one mole of an ideal gas from an initial volume of V to a final volume of 4.50V at constant temperature?

Name: What is the entropy change associated with the expansion of one mole of an ideal gas from an initial volume of V to a final volume of 4.50V at constant temperature?
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The entropy change for the isothermal expansion of an ideal gas is given by ΔS = nR ln(Vf/Vi). For one mole (n=1) and Vf = 4.50Vi, ΔS = R ln 4.50.

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