Doestheentropyofsurroundingincreaseor

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: n = ∆So products − ∆So reactants ∆Sorxn = [(4mol × 210.8 J 178.8 J mol • K ) + (6mol × 188.8 J mol • K )] − [(4mol × 192.8 J mol • K ) + (5mol × 205.2 J K 15 mol • K )] = Entropy changes and spontaneity • According to the 2nd Law of Thermodynamics: – “A spontaneous process is one that results in an increase of entropy in the universe.” • ∆ S°univ = ∆ S°system + ∆ S°surrounding For a spontaneous process: – ∆ S°univ > 0 • For a system at equilibrium: – ∆ S°univ = 0 • For a nonspontaneous process: – ∆ S°univ < 0 16 Two questions • Work on these individually and turn them in: – Does the entropy of surrounding increase or decrease in an exothermic process? – Does the entropy of surrounding increase or decrease in an endothermic process? 17 Temperature dependence of ∆ Ssurr • ∆ S...
View Full Document

This note was uploaded on 01/17/2014 for the course PHY 53890 taught by Professor Appling during the Fall '13 term at University of Texas at Austin.

Ask a homework question - tutors are online