Ch.11 - Liquids, Solids & Intermolecular ForcesWorksheetSee 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: Heats of fusion, vaporization, and sublimation.Is it possible to calculate the heat of sublimation for a substance given its heats of vaporization and fusion? If so, what is the relationship?

Problem

On the x-axis are four substances: butane, diethyl ether, water and mercury. Heat of phase change (kilojoules per mole) is on the y-axis, ranging from 0 to 90 with intervals of 10. For each substance, bars are shown for heat of fusion, heat of vaporization and heat of sublimation.  C4H10, butane, has a heat of fusion that is 5 kilojoules per mole, a heat of vaporization 24 kilojoules per mole, and a heat of sublimation 29 kilojoules per mole. C2H5OC2H5, diethyl ether, has a heat of fusion that is 7 kilojoules per mole, a heat of vaporization 29 kilojoules per mole, and a heat of sublimation 36 kilojoules per mole. H2O, water, has a heat of fusion that is 6 kilojoules per mole, a heat of vaporization 41 kilojoules per mole, and a heat of sublimation 47 kilojoules per mole. Hg, mercury, has a heat of fusion that is 23 kilojoules per mole, a heat of vaporization 58 kilojoules per mole, and a heat of sublimation 81 kilojoules per mole.
Heats of fusion, vaporization, and sublimation.

Is it possible to calculate the heat of sublimation for a substance given its heats of vaporization and fusion? If so, what is the relationship?