CHEM 1002 Lecture Notes - Lecture 1: Chemical Species, Joule, Calcium Chloride

• School: Carleton University
• Department: Chemistry
• Course: CHEM 1002
• Professor: Monica Patterson

Document Summary

E0 cell > 0, and so this reaction is spontaneous (aq) eo = +1. 358 v (aq) + 2 cl- (aq) eo cell = +2. 356 + 1. 358 = +3. 714 v. The shorthand notation for the cell is mg(s) | mg+2 (aq) || cl2(g) | cl- (aq) | pt(s) Electrons will flow from the anode (the mg) through the external circuit to the platinum cathode. D g = -nfe or d g0 = -nfe0 at standard conditions cell = +3. 714 v = +3. 714 j/c e. g. for the reaction mg(s) + cl2(g) mg+2. F = 96487 c/mol e- (aq) + 2 cl- (aq) Thus, d g0 = -nfe0 = - 2 mol e- (96487 c/mol e- ) (+3. 714 j/c) = -716 x 103 j (for the reaction as written, i. e. per mole of mg(s) or per 2 moles cl-) = -716 kj i. e. the reaction proceeds spontaneously.