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 diagram shows four states of a system, each with different internal energy, E. Which expression(s) represent the difference in energy between State C and State D?

Problem

The diagram shows four states of a system, each with different internal energy, E. State A is at the lowest internal energy (E), while State B is at the highest internal energy.  From State A, delta-E1 goes up to State C, about two-thirds of the way to State B.  From State C, delta-E2 goes up to State B. Also from State A, delta-E3 goes up to State D, about one-third of the way up to State B.  From State D, delta-E4 goes up to State B.

Which expression(s) represent the difference in energy between State C and State D?