Chapter 11
During evaporation, the (least/most) energetic molecules will escape first.
Most
A solution is a _______ mixture.
Homogenous
∆Hof means _______.
Enthalpy of Formation
Gases are more soluble at ____ temps and ____ pressures.
Low/high
Energy is always required to break chemical bonds (true or false).
True
(True or False) Quadrilateral crystals are one of the seven basic classes.
Why don't oil and water mix?
Water is polar.
Oil is non polar.
Polar and non polar substances do not mix.
Of all the states of matter, this has the greatest entropy.
Gas
This is the smallest unit of a crystal which can be used as a building block.
Unit Cell
Reactions in an endothermic reaction have (more/less) enthalpy than the products.
Less
Atomic crystals form when _______ freeze.
Noble Gases
The molarity of a solute in a solution is the number of moles of solute per _____ of solution.
Liter
This law states that the enthalpy change of a reaction equals the sum of the enthalpy changes for each step of the reaction.
Hess's Law
Intermolecular forest that exist only between polar molecules are ________ forces.
dipole-dipole
If the free-energy change (∆G) is positive, the reaction is ________.
non-spontaneous
These are surface-active substances that will increase the surface tension of liquid.
Surfactants
This law describes the relationship involved in CO2 dissolving in a can of soda.
Henry's Law
This is the measure of the dispersal of energy in a system.
Entropy
This is the process of covalent bonds breaking down.
Ionization
The amount of heat released by the complete burning of 1 mole of a substance.
Molar enthalpy of combustion
The temperature at which the vapor pressure of a substance equals 760 torr is called its _________.
Normal Boiling Point
The escape of gas from a liquid-gas solution is called _______.
Effervescence
This is the amount of heat required to raise the temperature of 1 gram of a substance 1oC.
Specific Heat
This distinguishes colloids from solutions.
The Tyndall effect
The quantity of heat required to change 1 mole of a solid to a liquid with no temperature change.
Molar enthalpy of fusion