Ch.12 - SolutionsWorksheetSee 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: At 35 oC the vapor pressure of acetone, (CH3 )2 CO, is 361 torr, and that of chloroform, CHCl3, is 301 torr. Acetone and chloroform can form weak hydrogen bonds between one another; the chlorines on the carbon give the carbon a sufficient partial positive charge to enable this behavior: A solution composed of an equal number of moles of acetone and chloroform has a vapor pressure of 250 torr at 35 oC.Based on the behavior of the solution, predict whether the mixing of acetone and chloroform is an exothermic (Hsoln < 0) or endothermic (Hsoln > 0) process.

Problem

At 35 oC the vapor pressure of acetone, (CH3 )2 CO, is 361 torr, and that of chloroform, CHCl3, is 301 torr. Acetone and chloroform can form weak hydrogen bonds between one another; the chlorines on the carbon give the carbon a sufficient partial positive charge to enable this behavior:
Acetone is a central C double bonded left to O and single bonded right, angled up and down, to two CH3s.
A solution composed of an equal number of moles of acetone and chloroform has a vapor pressure of 250 torr at 35 oC.

Based on the behavior of the solution, predict whether the mixing of acetone and chloroform is an exothermic (Hsoln < 0) or endothermic (Hsoln > 0) process.