Chem#7 - Name Sydney Reid College ID 0591992 Thomas Edison State College General Chemistry I(CHE-111 Section no 7 Semester and year Oct 2015 Written

Chem#7 - Name Sydney Reid College ID 0591992 Thomas Edison...

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Name: Sydney Reid College ID: 0591992 Thomas Edison State College General Chemistry I (CHE-111) Section no.: 7 Semester and year: Oct. 2015 Written Assignment 7: Energy and Thermochemistry Answer all assigned questions and problems, and show all work. 1.Consider this reaction:2CH3OH(l) + 3O2(g)4H2O(l) + 2CO2(g)H= –1452.8 kJ/mola.Is this reaction endothermic or exothermic? (2 points)b.What is the value of ∆H if the equation is multiplied throughout by 2? points)c.What is the value of ∆Hif the direction of the reaction is reversed so that the products become the reactants and vice versa? (2 points)d.What is the value of ∆Hif water vapor instead of liquid water is formed as the product? (2 points) (2 2.The first step in the industrial recovery of zinc from the zinc sulfide ore is roasting, that is, the conversion of ZnS to ZnO by heating:2ZnS(s) + 3O2(g)3ZnO(s) + 2SO2(g) H= –879 kJ/molCalculate the heat evolved (in kJ) per gram of ZnS roasted. (5 points) 1 Copyright © 2014 by Thomas Edison State College. All rights reserved.
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