Vocabulary
What is a reversible reaction?
A reaction that moves forward and in reverse simultaneously.
What factor affecting rates of reaction adds more particles to a reaction?
Concentration
A + B <--> AB
This reaction is at equilibrium.
If I add more of AB, where will equilibrium shift?
Left / toward reactants
Particles have to have enough of this when they collide in order to react.
Energy
What are the 4 stressors we discussed this unit?
pressure, temperature, concentration and catalysts.
Which factor forces particles to be closer together therefore increasing the rate of reaction?
Pressure
What direction will N2 + 3H2 ⇌ 2NH3 shift if pressure is added?
right / toward products
This can lower the activation energy required for a reaction and speed up a reaction in the process.
Catalyst
What is the rate of a reaction?
The rate of a reaction describes how frequently successful collisions happen to form reactants or products.
Which stressor provides more energy to atoms for collisions to occur?
Temperature
A + B <--> AB
If I added 2 moles of A and 5 moles of AB, how will equilibrium shift?
left / towards the reactants
True or False: Chemical reactions slow down when temperature rises.
False
What is activation energy?
The minimum energy needed to start a reaction.
What factor helps speed up a reaction but does NOT get used up itself in the reaction.
Catalyst
A + B <--> AB + heat
If I add XFZ, a catalyst, which way will equilibrium shift?
left / towards the reactants
True or False: The reaction rate is usually expressed as the change in amount of reactant or product over a given period of time.
True
What is chemical equilibrium?
When forward and reverse reactions happen simultaneously and at the same rate, resulting in constant concentration.
What does Le Chatelier's Principle state?
When a system experiences a disturbance, it will respond to restore a new equilibrium state.
A + B <--> AB + heat
This reaction is at equilibrium.
If I decrease the temperature, which way will equilibrium shift?
Right / towards the products
True or False: Reaching equilibrium means that the reaction is now complete and is over.
False.