Final Exam Flashcards
Measure of chaos within a system
Entropy
Do gases have low or high entropy?
High
Do solids have low or high entropy?
Low
A change from low entropy to high entropy has a positive or negative ΔS?
Positive ΔS
As entropy increases does the amount of moles increase or decrease?
Decrease
Positive ΔS favors spontaneity or non-spontaneity?
Spontaneity
What happens to ΔG when put in a reversed reaction?
It remains the same value but the sign becomes opposite
Do low activation energy reactions or high activation energy reactions have a high reaction rate?
Low activation energy reactions
Energy required for a reaction to occur
Activation Energy E_a
Does a catalyst increase or decrease the activation energy?
Decrease
Does a catalyst increase or decrease the rate of a reaction?
Increase
Does an increase in concentration increase or decrease the rate of a reaction?
Increase
Does an increase in temperature increase or decrease the rate of a reaction?
Increase
If the rate of the reaction is equal to the rate of the reversed reaction this is an example of?
Equilibrium
Equilibrium constant
K=[C]^c[D}^d/[A]^a[B]^b
Reaction: aA+bB–> cC+dD
An increase in concentration of reactants shifts the equilibrium towards?
Products
An increase in temperature of reactants shifts the equilibrium towards?
Products
An increase in pressure shifts equilibrium towards?
The side with fewer moles
How does a catalyst affect the equilibrium?
Equilibrium does not change
Solid to liquid
Melting
Liquid to solid
Freezing
Liquid to gas
Vaporization
Gas to liquid
Condensation
Solid to gas
Sublimation
Gas to solid
Deposition
What value of ΔH occurs during melting?
Positive because heat is absorbed
What value of ΔH occurs during condensation?
Negative because heat is released
Intermolecular forces weakest to strongest?
London Dispersion, Dipole-Dipole, Hydrogen Bonding, Ionic
Intermolecular forces weakest to strongest?
Dipole-Dipole intermolecular force only occurs between _______________ molecules?
Polar
Hydrogen Bonding intermolecular force only occurs between ____________ bonds?
H-F, H-O, H-N
Intermolecular forces within C2H5Cl?
London Dispersion, Dipole-Dipole
