Author Question: Predict the sign of S for each of the following systems, which occur at constant temperature.I.The ... (Read 40 times)

Medesa · **on:** Feb 15, 2020

Question 1

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 2.50V at constant temperature?
◦ ΔS = 2.50 R ln (Vf/Vi)
◦ ΔS = R ln 2.50
◦ ΔS = -2.50 R ln (Vf/Vi)
◦ ΔS = -R ln 2.50

Question 2

Predict the sign of ΔS for each of the following systems, which occur at constant temperature.

I.	The volume of 2.0 moles of Ne (g) increases from 54 L to 62 L.

II.	The pressure of 2.0 moles of Ne (g) increases from 0.90 atm to 1.0 atm.

◦ I: ΔS = positive; II: ΔS = positive
◦ I: ΔS = negative; II: ΔS = positive
◦ I: ΔS = positive; II: ΔS = negative
◦ I: ΔS = negative; II: ΔS = negative

mrphibs · **Reply #1 on:** Feb 15, 2020

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