UConn Chemistry 1128Q Exam 1 VERIFIED SOLUTIONS, SCORED A+

UConn Chemistry 1128Q Exam 1 VERIFIED
SOLUTIONS, SCORED A+



solid .to .gas .- .CORRECT .ANSWER-increase .in .Kinetic .energy

gas .to .solid .- .CORRECT .ANSWER-increase .in .inter .molecular .forces

intramolecular .force .- .CORRECT .ANSWER-bonds .within .molecule

intermolecular .forces .- .CORRECT .ANSWER-bonds .between .molecules

Dispersion .Forces .- .CORRECT .ANSWER-weak .forces .that .result .from .temporary
.shifts .in .the .density .of .electrons .in .electron .clouds


typically .two .non-polar .diatomic .molecules.

Dipole-Dipole .Attractions .- .CORRECT .ANSWER-attractive .forces .between
.oppositely .charged .ends .of .polar .molecules


Hydrogen .Bonds .- .CORRECT .ANSWER-The .H .from .one .molecule .can .associate
.itself .with .the .negative .end .
of .the .dipole .of .another.
• .Dipole .arises .from .the .difference .in .the .electronegativity .between .H .and .(N, .O,
.or .F)
• .Small .size .of .H .allows .the .unshared .pair .from .the .negative .end .of .the .dipole
.to .approach .the .H .closely


Vaporization .- .CORRECT .ANSWER-a .phase .transition .from .the .liquid .phase .to
.gas .phase .
(vapor).

Condensation .- .CORRECT .ANSWER-a .phase .transition .from .the .gas .phase .to
.the .liquid .
phase.

equilibrium .- .CORRECT .ANSWER-When .the .rate .of .vaporization .is .equal .to .the
.rate .of .condensation


Vapor .Pressure .- .CORRECT .ANSWER-The .pressure .exerted .by .the .vapor .in
.equilibrium
with .a .liquid .in .a .closed .container .at .a .given .temperature.

, • .If .there .are .strong .intermolecular .forces .between .the .molecules, .the .vapor
.pressure .is .- .CORRECT .ANSWER-low


If .there .are .weak .intermolecular .forces .between .the .molecules, .the
vapor .pressure .is .- .CORRECT .ANSWER-high

Boiling .Point .- .CORRECT .ANSWER-The .temperature .at .which .its .equilibrium
.vapor .pressure .is .equal .to .the .atmospheric .pressure.


Clausius-Clapeyron .Equation .- .CORRECT .ANSWER-P1 .- .Vapor .pressure .at
.temperature .T1
P2 .- .Vapor .pressure .at .temperature .T2
DeltaHvap .- .Enthalpy .of .vaporization .
R .- .8.314 .J/mol*K

Solution .- .CORRECT .ANSWER-Homogeneous .mixture .of .two .or .more
.substances


Solute .- .CORRECT .ANSWER-A .substance .that .is .dissolved .in .a .solution.

Solvent .- .CORRECT .ANSWER-the .substance .in .which .the .solute .dissolves .in

Step .1 .and .2 .of .solute .formation .- .CORRECT .ANSWER-Endothermic

Step .3 .of .solute .formation .- .CORRECT .ANSWER-Exothermic

If .{Delta .H1 .+ .Delta .H2} .< .{Delta .H3} .- .CORRECT .ANSWER-Exothermic .overall

If .{Delta .H1 .+ .Delta .H2} .> .{Delta .H3} .- .CORRECT .ANSWER-Endothermic .overall

ideal .solutions .- .CORRECT .ANSWER-no .net .energy .change .when .making .the
.solution


Immiscible .- .CORRECT .ANSWER-liquids .that .are .not .soluble .in .each .other

Miscible .- .CORRECT .ANSWER-Describes .two .liquids .that .are .soluble .in .each
.other


non-electrolyte .- .CORRECT .ANSWER-A .substance .that .dissolves .in .water .to
.give .a .solution .that .does .not .conduct .an .electric .current


does .not .dissociate .into .ions

covalent

Electrolyte .- .CORRECT .ANSWER-An .ionic .compound .whose .aqueous .solution
.conducts .an .electric .current


dissociates .into .ions .