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: The value of ΔH° for the following reaction is -3351 kJ.2Al(s) + 3O2(g)      →       2Al 2O3(s)What is the ΔH° for the formation of 75.0 g of Al 2O3(s) (kJ)? a. -2.51 x 107b. -1.26 x 105c. -2460d. -12

Problem

The value of ΔH° for the following reaction is -3351 kJ.

2Al(s) + 3O2(g)      →       2Al 2O3(s)

What is the ΔH° for the formation of 75.0 g of Al 2O3(s) (kJ)?

 

a. -2.51 x 107

b. -1.26 x 105

c. -2460

d. -1230

e. +3351