WorksheetsModule 4: Reaction Rates and Chemical Equilibrium
Total questions: 20
Worksheet time: 25mins
Label the parts of the reaction diagram.
reactants
products
activation energy
Which of the following would increase the rate of reaction? Select ALL correct answers.
Addition of a catalytst
Increasing the temperature
Decreasing activation energy
Decreasing the energy of the products
Increasing the concentration of reactants
Reaction rates are increased by (a) the (b) between reactants.
What is activation energy?
What is the activation energy (in kJ) of the reaction shown in the diagram?
Substance that increases the rate of reaction by decreasing activation energy.
(a)
How do catalysts speed up the rate of reaction?
By decreasing the energy difference between producst and reactants
By adding energy to a reaction
By decreasing the activation energy required for a reaction
By increasing the kinetic energy of reactants
In exothermic reactions, energy is (a) .
In endothermic reactions, energy is (b) .
Organize these options into the right categories
ΔE is negative
ΔE is positive
Energy is released
Energy is absorbed
Energy is a product
Energy is a reactant
A + B --> C + energy
X + Y + energy --> Z
Products are lower energy than reactants
Products are higher energy than reactants
Is this reaction exothermic or endothermic?
Exothermic, because the products are lower energy than the reactants
Endothermic, because the products are lower energy than the reactants
Exothermic, because the products are higher energy than the reactants
Endothermic, because the products are higher energy than the reactants
Is this reaction exothermic or endothermic?
Exothermic, because the products are lower energy than the reactants
Endothermic, because the products are lower energy than the reactants
Exothermic, because the products are higher energy than the reactants
Endothermic, because the products are higher energy than the reactants
What does it mean for a chemical reaction to be in equilibrium?
If the equilibrium for reaction shifts to the left, what will happen?
W + X + heat ⟺ Y + Z
More W, X, and heat will be produced
More Y and Z will be produced
What is Le Chatelier's Principle used for in chemistry?
According to Le Chatelier's principle, what factors cause predictable changes to a system in equilibrium?
Changes in the shape of the reaction vessel
According to Le Chatelier's principle, what will happen if additional reactant is added?
The system will move in the forward direction to consume the added reactant.
The system will move in the reverse direction to replace the added reactant.
A + B ⟺ C + D + heat
If A is removed from the reaction, the reaction will run in the (a) direction,
to generate more (b) .
A + B ⟺ C + D + heat
If B is added to the reaction, the reaction will run in the (a) direction,
to (b) the added reactant.
Predict the equilibrium shift for each situation
A + B ⟺ C + heat
Decreasing [A]
Decreasing [B]
Increasing [C]
Increasing the temperatur
Increasing [A]
Increasing [B]
Decreasing [C]
Decreasing the temperature
Predict the equilibrium shift for each situation
CH4+CCl4 ⟺ CO + Cl2
Increasing [CO]
Increasing [Cl2]
Decreasing [CH4]
Decreasing [CCl4]
Decreasing [CO]
Decreasing [Cl2]
Increasing [CH4]
Increasing [CCl4]
