Ch. 17 - Chemical ThermodynamicsWorksheetSee 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: H2 reacts with the halogens (X2) according to the following reaction: H2(g) + X2(g) ⇌ 2 HX(g), where X2 can be Cl2, Br2, or I2.Reactant/ProductΔH˚f (kJ/mol)ΔS˚f (J/mol K) H2(g)0130.7Cl2(g)0223.1HCl(g)–92.3186.9Br2(g)30.9245.5HBr(g)–36.3198.7I2(g)62.42260.69HI(g)26.5206.6Calculate Kp for the reaction between hydrogen and I2.

Problem

H2 reacts with the halogens (X2) according to the following reaction: H2(g) + X2(g) ⇌ 2 HX(g), where X2 can be Cl2, Br2, or I2.

Reactant/ProductΔH˚f (kJ/mol)ΔS˚f (J/mol K) 
H2(g)0130.7
Cl2(g)0223.1
HCl(g)–92.3186.9
Br2(g)30.9245.5
HBr(g)–36.3198.7
I2(g)62.42260.69
HI(g)26.5206.6

Calculate Kp for the reaction between hydrogen and I2.