What word correctly describes a combustion reaction?
Exothermic
Endothermic
Exathermic
During an endothermic reaction what happens to the temperature of the surroundings?
The temperature of the surroundings stays the same
The temperature of the surroundings goes up
The temperature of the surroundings goes down
In the energy level diagram for an exothermic reaction, where is the energy level of the products drawn?
At the same energy level as the reactants
Above the energy level of the reactants
Below the energy level of the reactants
In the energy level diagram for an endothermic reaction which way should the arrow be facing?
To the right
Upwards
Downwards
What effect does a high activation energy have on a reaction?
It has no effect on the reaction
The reaction will be slow
The reaction will be fast
How is the overall energy change of the reaction shown on a reaction profile diagram?
The difference between the energy level of the reactants and products
The difference between the top of the reaction profile and the energy level of the products
The difference between the top of the reaction profile and the energy level of the reactants
How is the activation energy shown on a reaction profile diagram?
What effect does a catalyst have on the rate of a reaction?
No effect on the rate
Increases the rate
Decreases the rate
How does a catalyst affect activation energy?
It does not affect the activation energy
It increases the activation energy
It decreases the activation energy
What name describes the energy change when bonds are broken?
Thermal decomposition