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Chem 231-Chapter 12 IM Forces

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holdsmyheart316's version from 2016-12-13 01:01

Section

Question Answer
Gas has _________ IM forcesweak
To go from gas to liquid _________ the pressureincrease
___ energy is favorablelower
as we heat a closed system the vapor pressure ___, density of gas phase _________, and density of liquid phase _________increases, increases, decreases
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Section

Question Answer
as molar mass increases IM forces___ in strengthincrease
Dispersion forces arise fromtemporary dipole moments in nonpolar and polar molecules
Dispersion forces and boiling point ___ with molar massincrease
The longer and straighter the chain, the ___ the boiling pointhigher
memorize

Section

Question Answer
Dipole-Dipole forces arise fromattractions between polar molecules
Polar substances have a _________ boiling point that nonpolar substanceshigher
If there are two things with similar IM forcesthey will be mixable
memorize

Section

Question Answer
Hydrogen bonding is a special case of dipole-dipole in whichH is attracted to the lone pairs of F, O, or N
In order for an H to experience Hydrogen bonding, it must firstbe covalently bonded to an electronegative atom
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Section

Question Answer
surface tension is strong when IM forcesare also strong
molecules under the surface have _________ IM forces than those on the surfacehigher (because they are totally surrounded by other molecules to form attractions with)
viscosity is _________ dependenttemperature
higher IM forces _________ viscosityhigher
higher T _________ viscositylower
with vaporization, IM forces arebroken
as T goes up, vaporizationgoes up
as IM forces go down, vaporizationgoes up
memorize

Section

Question Answer
vapor pressure isthe pressure of a gas at dynamic equilibrium
if a substance is volatile itis easily vaporized because of weak IM forces
boiling point isthe T at which the liquid's vapor pressure equals atmosphere pressure
at normal boiling point vapor pressure equals1atm
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