CHM135H1 Lecture : Notes taken during lecture

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31 Dec 2010
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CHM135H1 Full Course Notes
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CHM135H1 Full Course Notes
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Exam: 3 hours; 5 short answers, 28 m/c questions half of exam is new material (untested) other half is units 1 to 4. Notes electrochemistry deals with relationship between chemical reactions and electricity spontaneous reactions can produce electricity and electricity can cause non-spontaneous reactions to occur. Delta s is negative because entropy of gas greater than that of liquids. Delta g = delta h etc. formula. Both delta h and delta s are negative. Whenever both signs the same, some temperatures spontaneous some not. Q = 1/ (p of h2)squared times p of o2 = 1. Therefore k is greater than one for reaction to go to products. K = 1. 44x10^83 therefore reaction goes to completion. Calculate temperature when reaction switches from non- (1000j/kj)(-474kj) = (-8. 314j/molk)(298k)ink spontaneous to spontaneous. Delta g = delta h t times delta s with delta g = 0. Delta s = 2mol(699. 9j/molk) 2mol(130. 6j/molk) . T = delta h/delta s = 1751 k.

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