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Name all the reaction orders

Zero order First order Second order Higher order Mixed order 

M

Molarity mol solute/L of solution 

ZeroOrder reactions

has a constant rate, independent of the reactants concentration. r = k 

What are the units of k?

Msec^{1}


Radioactive decay

[A_{t}] = [A_{o}] e^{kt} [A_{o}] is the initial concentration of A [A_{t}] is the concentration of A at time T k is the rate constant t is elapsed time 

products < reactants

exothermic () 

products > reactants

endothermic (+)


What are the factors affecting reaction rate?

reactant concentration temperature medium catalyst 

Equilibrium Expression

Products / Reactants


What type of states don't appear in the equilibrium constant?

liquids and solids


Le Chatelier's principle

A system to which stress is applied tends to change to relieve the applied stress.


A + B > C + D < If more A is added 
Then the equilibrium will switch to the right


Change in pressure and volume

Inverse to one another. If pressure increases, volume will decrease. If pressure or volume is increased the equilibrium will go to the least amount of moles.


Change in Temperature

In an exothermic reaction: If the temperature increases the EQ will go to the left. If the temperature decreases the EQ will go to the right. 

Equation to determine the decay constant

t_{1/2} = 0.693 / k


What types of systems exist

isolate, closed, and open isolated neither energy or matter can be exchanged closed only energy can be exchanged open everything can b exchanged 

isothermal

occurs when the temperature of the system remains constant


adiabatic

occurs when no heat exchange occurs


isobaric

when the pressure of the system remains constant


Heat is measured in?

calories (cal) or Joules (J)


Measuring calorimetry or heat changes

q = mc(delta)T


Enthalpy

delta H = H of products  H of reactants


Hess's Law

States that enthalpies of reactions are additive.


Entropy is the measure of?

Disorder or randomness. The greater the entropy the more disorder.


What's the second law of thermodynamics

all spontaneous process proceed such that the entropy of the system plus its surrounding increases


Gibbs Free Energy equation

deltaG = deltaH  TdeltaS


If delta G is negative

the reaction is spontaneous


delta H delta S  + +  + +   
spontaneous all the time nonspontaneous all the time spontaneous at high T spontaneous at low T 

ΔG₀

ΔG₀ =  R·T·ln(Keq)


ΔG

ΔG₀ + R·T·ln Q
