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
Sections
Internal Energy
Calorimetry
Hess's Law
Enthalpy of Formation
End of Chapter 6 Problems
Additional Practice
Units of Energy
Endothermic & Exothermic Reactions
Additional Guides
Enthalpy

Solution: Given the following data: 3CO2(g) + 4H2O(l) ⇌ C3H8(g) + 5O2(g) ∆H = 1, 110 kJ · mol−1 H2O(l) ⇌ H2(g) + 1/2O2(g) ∆H = 142.5 kJ · mol−1 3Cgraphite + 4H2(g) ⇌ C3H8(g) ∆H = −52 kJ · mol−1 calculate ∆H for the reaction Cgraphite + O2(g) ⇌ CO2(g) 1. 1202 kJ · mol−1 2. −592 kJ · mol−1 3. 543 kJ · mol−1 4. −197 kJ · mol−1 5. −543 kJ · mol−1  

Problem

Given the following data:

3CO2(g) + 4H2O(l) ⇌ C3H8(g) + 5O2(g)

∆H = 1, 110 kJ · mol−1

H2O(l) ⇌ H2(g) + 1/2O2(g)

∆H = 142.5 kJ · mol−1

3Cgraphite + 4H2(g) ⇌ C3H8(g)

∆H = −52 kJ · mol−1

calculate ∆H for the reaction

Cgraphite + O2(g) ⇌ CO2(g)

1. 1202 kJ · mol−1

2. −592 kJ · mol−1

3. 543 kJ · mol−1

4. −197 kJ · mol−1

5. −543 kJ · mol−1