1. Consider the following thermochemical 2ZnS (s) + 302(g) → 2ZnO (s) + 2SO2(g) equation: AH° = -878.2 kJ (a) How much heat is released when 3.0 mol ZnS (s) reacts in excess oxygen? (b) How much heat is released when 2.3 x 10-² mol ZnS() reacts in excess oxygen? (c) What is the enthalpy change when 223.9 g ZnS (s) reacts in excess oxygen?
1. Consider the following thermochemical 2ZnS (s) + 302(g) → 2ZnO (s) + 2SO2(g) equation: AH° = -878.2 kJ (a) How much heat is released when 3.0 mol ZnS (s) reacts in excess oxygen? (b) How much heat is released when 2.3 x 10-² mol ZnS() reacts in excess oxygen? (c) What is the enthalpy change when 223.9 g ZnS (s) reacts in excess oxygen?
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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Transcribed Image Text:Reinforce your understanding of the stoichiometry of thermochemical
equations.
Answer the questions below in the spaces provided.
1. Consider the following thermochemical equation:
2ZnS (s) + 3O2(g) → 2ZnO (s) + 2SO2(g)
(a) How much heat is released when 3.0 mol ZnS (s) reacts in excess
oxygen?
AH° = -878.2 kJ
(b) How much heat is released when 2.3 x 10-2 mol ZnS (s) reacts in
excess oxygen?
(c) What is the enthalpy change when 223.9 g Zns (3) reacts in excess
oxygen?
Copyright © 2002 McGraw-Hill Ryerson Limited
Name:
Class:
(d) What is the enthalpy change when 0.96 g Zno(s) is produced?
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