Mulitiple Choice Questions Flashcards
Determine equilibrium direction: add SO3
Left
Add catalyst
No change
Remove SO2
Left
Increase pressure
Right
Decrease pressure
Right
A half life represents
How long it will take for a reaction to split in half
If a reaction has an order of 1 you do what to the reaction rate
Double the reaction rate
What step determines the rate law
Slow step
If you add more gaseous reactant to a reaction at equilibrium the reaction will shift towards the
Left
The reaction is exothermic. What will shift the equilibrium to the left
A. Increase volume
B. Raising the temperature
C. Decrease pressure
D. Adding a catalyst
Increasing the volume
Dynamic equilibrium
Occurs when a reaction and it’s reverse reaction proceed at the same rate
A catalyst does what to the activation barrier
It lowers activation energy barrier so less energy for the reaction
K>1 it favors the
Products
K<1 it favors the
Reactants
Q>K what does that mean
The reverse reaction will will proceed to form more reactants
Q<K what does that mean
It will go to form more products ( you can draw it out)
Q=K
Your at equilibrium
If it’s a liquid there is
No change in equilibrium
In a endothermic process heat is on the
Reactant side
In a exothermic process heat is in the
Product side
Increase of volume goes to the side of more or less moles
More moles
In an equilibrium question with shifting where does it want to shift to
It wants to shift to the side with less stuff to relieve strees
How do intermolecular forces affect boiling point
stronger IMF require higher energy to distrupt the interaction
- stronger IMF require higher BP
List the IMF in increasing strength (low to high)
Dispersions, dipole-dipole, Hbonds, ion dipole, covalent, ionic
Name 2 parts of a solution
Solute and solvent
define molaity ( m)
Moles of solute/ kg of solvent
Define molarity
Moles of solute/L of solution
For solute solvent interactions does delta H increase or decrease to overcome molecular forces
Increase
Does increasing temperature increase or decrease the soluability of gases
Decrease
What type of IMF is due to the attraction of two polar molecules
Dipole dipole bonds
What type of IMF is due to the attraction of two atoms
Dispersion
Is the vapor pressure of a solution higher or lower than a pure solvent
Lower
By adding table salt to water would the boiling point increase or decrease
Increase
Boiling point is defined as the temperature at which
The vapor pressure is equal to the atmospheric pressure
Which of the following is true
The soluabilty of a solid is highly dependable on temperature
Give the reason that antifreeze is added to a car radiator
The freezing point is lowered and the boiling point is elevated so that the car radiator doesn’t freeze
How to know which hydrocarbon has the highest boiling point
Chose the biggest molecule because it needs higher temperature to boil
For a solution in a close container at equilibrium which if the following pairs represent a process at equal rate
Evaporation and condensation
A solution containing more than a maximum amount of solute is called
A supersaturated solution
Subliming
Moving from low to high
Condensing
Moving from high to low
