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: Using the following data, calculate the standard heat of formation of ICl(g) in kJ/mol:Cl2 (g) → 2Cl (g)          ΔH° = 242.3 kJI2 (g) → 2I (g)               ΔH° = 151.0 kJICl (g) → I (g) + Cl (g)    

Solution: Using the following data, calculate the standard heat of formation of ICl(g) in kJ/mol:Cl2 (g) → 2Cl (g)          ΔH° = 242.3 kJI2 (g) → 2I (g)               ΔH° = 151.0 kJICl (g) → I (g) + Cl (g)    

Problem

Using the following data, calculate the standard heat of formation of ICl(g) in kJ/mol:

Cl2 (g) → 2Cl (g)          ΔH° = 242.3 kJ

I2 (g) → 2I (g)               ΔH° = 151.0 kJ

ICl (g) → I (g) + Cl (g)    ΔH° = 211.3 kJ

I(s) → I2 (g)               ΔH° = 62.8 kJ


Solution

Formation of ICl(g) from it elements:

Natural element form of iodine  I2(s)

Natural element form of chlorine  Cl2(g) 


In a formation equation, one mole of the product should be forming:

Formation equation of ICl(g): ½ I2(s) + ½ Cl2(g)  ICl(g)

Manipulate reaction such that when you add them you arrive to the formation equation of ICl(g):

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