Two moles of a sample of an ideal gas at 25⁰C is allowed to expand reversibly and isothermally from 1 dm³ to 10 dm³. What is ΔS, for the gas, and what is ΔS for its surroundings? b. The same gas is expanded adiabatically and irreversibly from 1 dm³ to 10 dm³ with no work done. What is the final temperature of the gas? What is ΔS for the gas and ΔS for the surroundings? What is the ΔS(tot)?

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