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: What is the minimum energy required to decompose 765 g of PCl 3, according to the reaction below? The molar mass of PCl3 is 137.32 g/mol. 4PCl3(g) → P4(s) + 6Cl2(g)           ΔH°rxn = +1207 kJ a. 2.31

Problem

What is the minimum energy required to decompose 765 g of PCl 3, according to the reaction below? The molar mass of PCl3 is 137.32 g/mol. 

4PCl3(g) → P4(s) + 6Cl2(g)           ΔH°rxn = +1207 kJ 

a. 2.31 x 103 kJ 

b. 4.33 x 103 kJ 

c. 6.72 x 103 kJ 

d. 1.68 x 103 kJ 

e. 5.95 x 103 kJ