Concentration Units
Solutions are composed of two things __________ and ____________.
solute and solvent
What is the strongest IMF present in:
CH3CH2CH2CH2CH2CH2CH3
Dispersion Forces
Name the phase change of going from solid to gas
Sublimation
(True/False) Can temperature affect the rate constant (k)
True. Concentration of reactions CANNOT affect the rate constant
What unit of concentration (Molarity/molality) do the freezing point depression and boiling point elevation equations use?
ΔTf = i __Kf Δ Tb = i __ Kb
molality (m)
What is the strongest force present in:
CH3CH2OH
Hydrogen-bonding
Write out whether each state of matter (solid, liquid, gas) has definite or indefinite volumes
*remember I'm asking about volume NOT shape*
solid: definite
liquid: definite
gas: indefinite
What order of reaction (zero/first/second) occurs when changing the concentration of reactant has NO EFFECT on the rate of the reaction
zero order
What unit of concentration (Molarity or molality) does the osmotic pressure equation use?
π = i __ R T
Molarity (M)
Rank the 4 intermolecular forces from weakest to strongest
(1 weakest) dispersion, (2) dipole-dipole, (3) hydrogen-bonding, (4 strongest) ion-dipole
ΔHfusion is used for ______ and _______
ΔHvaporization is used for ______ and ________
ΔHfusion= melting and freezing
ΔHvaporization=evaporation and condensation
What is the overall order of this rate law:
rate=k[NO]2[O3][H2O]3
6 (2+1+3)
What are the units of Molarity (include terms like solute/solvent/solution)
moles solute / Liters of solution
Surface tension, viscosity, boiling + melting point, capillary action, and vapor pressure have relationships with IMF force strength. For each of these properties, write if they increase or decrease with increasing IMF strength
Surface tension: increase
Viscosity: increase
Boiling + melting point: increase
Capillary action: increase
Vapor Pressure: DECREASE
Melting is an (endothermic/exothermic) process
endothermic
(True/False) You can determine the rate law of a reaction based on the coefficients of the balanced reaction
FALSE. The rate law can only be determined experimentally
What are the units of molality? (include terms like solute/solvent/solution)
moles solute / kilograms of solvent
In water the (adhesive/cohesive) forces are strongest, leading to a (convex/concave) meniscus
adhesive, concave
A negative slope on the solid-liquid equilibrium line means that the solid state of matter is (less/more) dense than the liquid state
Less dense (think of water!)
rate= k[O2]2[H2O2]0
(True/False) Doubling the concentration of H2O2 will double the rate of reaction
False. H2O2 is zero order, so it has no affect on the rate of reaction