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Ch.19 - Free Energy & Thermodynamics
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All textbooksTro 6th EditionCh.19 - Free Energy & ThermodynamicsProblem 87b

Chapter 19, Problem 87b

Determine the sign of ΔSsys for each process. b. water freezing

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Hello everyone today. We are being asked to identify the sign for the entropy change of the system for the condensation of ethanol. So we can recall that condensation is a process of going from a gas to a liquid. In other words, we are going from a state with the highest entropy, which is gas, to a state of lower entropy, which is a liquid. And so we can therefore say that we are going to have a negative delta S. Sign for the entropy change. I hope this helped, and until next time.
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Consider the reaction: 2 NO( g) + O2( g) ⇌ 2 NO2( g) The following data show the equilibrium constant for this reaction measured at several different temperatures. Use the data to find ΔH° rxn and ΔS°rxn for the reaction.

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