chem

Question 1

Explain what an endothermic reaction is.

Answer 1

An endothermic reaction takes in or absorbs heat energy from the surroundings.

Question 2

what is an exothermic reaction is.

Answer 2

An exothermic reaction releases heat energy from the surroundings

Question 3

What happens to the temperature of an exothermic reaction as the reaction proceeds

Answer 3

The temperature of an exothermic reaction increases as the reaction proceeds.

Question 4

What happens to an endothermic reaction as a reaction proceeds.

Answer 4

The temperature of an endothermic reaction decreases at the reaction proceeds.

Question 5

Give two uses of endothermic reactions.

Answer 5

For a cold pack

For a self chilling beer

Question 6

Give two uses for and exothermic reaction

Answer 6

reusable hand warmers

disposable hand warmers

Question 7

What is the general word equation to represent a neutralisation reaction

Answer 7

acid + alkali -> salt + water

Question 8

why does the temperature of a mixture start decreasing.

Answer 8

When the neutralisation reaction is over the temperature of a mixture starts decreasing