Energy Transfers

Question 1

When chemical reactions occur energy is transferred from the_____ the two or from the_____

Answer 1

1. chemical

2. surroundings

Question 2

What are many reactions accompanied by

Answer 2

Temperature change

Question 3

What type of temperature change are exothermic reactions accompanied by

Answer 3

A rise

Question 4

What do exothermic reactions give out

Answer 4

Heat energy

Question 5

What is an example of a product with exothermic reactions are used

Answer 5

Self heating cans

Question 6

What type of temperature change or endothermic reactions accompanied

Answer 6

I fall in temperature

Question 7

In endothermic reactions where is heat energy transferred from

Answer 7

The surroundings to the chemicals the chemicals taking the heat

Question 8

What type of reactions do some sports injury packs

Answer 8

Endothermic reactions as they heat up

Question 9

If a reversible reaction is exothermic and one direction then what is it in the opposite direction

Answer 9

Endothermic

Question 10

The minimum amount of energy that particles must have for the reaction to take place is called________

Answer 10

The activation energy

Question 11

For bonds to be broken what must happen

Answer 11

Reacting particles must collide with the sufficient energy