Exothermic and endothermic reactions - AQA

1

What piece of apparatus is used to measure temperature changes?

2

What term is given to a reaction which transfers heat energy to the surroundings?

3

When barium hydroxide and ammonium chloride react, the temperature of the mixture decreases. What kind of reaction is this?

4

Which of the following should be used to contain the solution when investigating an energy change?

5

If the energy change on an energy level diagram is negative, what does this tell you about the reaction?

6

On a reaction profile, what does the height of the hump represent?

7

Which of these is an endothermic reaction?

8

What can you deduce from the reaction profile below?

a reaction profile graph showing the energy of the reactants lower than the energy of the products

9

When calcium reacts with water, the temperature changes from 18°C to 39°C. Which statement is correct?

10

If a reaction releases more energy when new bonds are made than the amount of energy absorbed to break bonds in the reactants, which statement is true? - Higher