Ch.9 - Bonding & Molecular StructureWorksheetSee 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: Lithium iodide has a lattice energy of −7.3 x 10kJ/mol and a heat of hydration of −793kJ/mol. Find the heat of solution for lithium iodide.

Solution: Lithium iodide has a lattice energy of −7.3 x 102 kJ/mol and a heat of hydration of −793kJ/mol. Find the heat of solution for lithium iodide.

Problem

Lithium iodide has a lattice energy of −7.3 x 10kJ/mol and a heat of hydration of −793kJ/mol. Find the heat of solution for lithium iodide.

Solution

We are being asked to calculate for the heat of solution of lithium iodide using its lattice energy and heat of hydration.


Lattice energy represents the energy released when 1 mole of an ionic crystal is formed from its gaseous ions.

The heat of hydration of an ion is the amount of heat released when one mole of that ion dissolves in water.

The heat of solution, enthalpy change related to the dissolution of a substance in a solvent. It will be composed of the process - bonds being broken and bonds being formed.


Hsolution=bond breaking-bond forming


The equation below relates the lattice energy, heat of solution, and heat of hydration:

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