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: Consider these reactions, where M represents a generic metal2M(s) + 6HCl(aq) → 2MCl3(aq) + 3H2(g)                H=-748.0 kJHCl(g) → HCl(aq)                                                   H=-74.8H2

Solution: Consider these reactions, where M represents a generic metal2M(s) + 6HCl(aq) → 2MCl3(aq) + 3H2(g)                H=-748.0 kJHCl(g) → HCl(aq)                                                   H=-74.8H2

Problem

Consider these reactions, where M represents a generic metal

2M(s) + 6HCl(aq) → 2MCl3(aq) + 3H2(g)                H=-748.0 kJ

HCl(g) → HCl(aq)                                                   H=-74.8

H2(g) + Cl2(g) → 2HCl(g)                                       H=-1845

MCl3(s) → MCl3(aq)                                               H=-317.0

Using the information above to determine the enthalpy of the following reaction

2M(s) + 3Cl2(g) → 2MCl3(s)