Ch.6 - Thermochemistry WorksheetSee all chapters
All Chapters
Ch.1 - Intro to General Chemistry
Ch.2 - Atoms & Elements
Ch.3 - Chemical Reactions
BONUS: Lab Techniques and Procedures
BONUS: Mathematical Operations and Functions
Ch.4 - Chemical Quantities & Aqueous Reactions
Ch.5 - Gases
Ch.6 - Thermochemistry
Ch.7 - Quantum Mechanics
Ch.8 - Periodic Properties of the Elements
Ch.9 - Bonding & Molecular Structure
Ch.10 - Molecular Shapes & Valence Bond Theory
Ch.11 - Liquids, Solids & Intermolecular Forces
Ch.12 - Solutions
Ch.13 - Chemical Kinetics
Ch.14 - Chemical Equilibrium
Ch.15 - Acid and Base Equilibrium
Ch.16 - Aqueous Equilibrium
Ch. 17 - Chemical Thermodynamics
Ch.18 - Electrochemistry
Ch.19 - Nuclear Chemistry
Ch.20 - Organic Chemistry
Ch.22 - Chemistry of the Nonmetals
Ch.23 - Transition Metals and Coordination Compounds

Solution: Calculate ΔH°rxn for the reaction 2 Ni(s) + 2 S(s) + 3 O2(g) → 2 NiSO3(s) from the following information: (1) NiSO3(s) → NiO(s) + SO2(g)       ΔH°rxn = 156 kJ   (2) S(s) + O2(g) → SO2(g)         

Problem

Calculate ΔH°rxn for the reaction

2 Ni(s) + 2 S(s) + 3 O2(g) → 2 NiSO3(s)

from the following information:

(1) NiSO3(s) → NiO(s) + SO2(g)       ΔH°rxn = 156 kJ

 

(2) S(s) + O2(g) → SO2(g)                 ΔH°rxn = -297 kJ 

 

3) Ni(s) + 1/2 O2(g) → NiO(s)           ΔH°rxn = -241 kJ