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 the two diagrams below. Based on (ii), write an equation relating HZ to the other enthalpy changes in the diagram.

Problem

Consider the two diagrams below.
(i) A is the increase in enthalpy from an initial low state to a high state in one step. B is an increase from the initial low state to an intermediate state, followed by C, which increases from that intermediate state to the final high state. (ii) X is the increase in enthalpy from an initial low state to a high state in one step. Y is a decrease in enthalpy from that high state to an intermediate state; Z is an increase from the initial state to that same intermediate state.

Based on (ii), write an equation relating HZ to the other enthalpy changes in the diagram.