[C6] Energy changes in chemical reactions

Question 1

Describe the meaning of exothermic reactions.

Answer 1

A reaction in which energy is released in the form of light or heat.

Question 2

Describe the meaning of endothermic reactions.

Answer 2

A reaction or process accompanied by or requiring the absorption of heat.

Question 3

Bond breaking is an _____ process because bond breaking requires ____.

Answer 3

Endothermic and Energy

Question 4

Bond forming is an ____ process as it ____ ____.

Answer 4

Exothermic, releases energy

Question 5

burning of a candle is an exothermic/endothermic reaction

Answer 5

exothermic

Question 6

reaction between sodium and water is exothermic/endothermic reaction

Answer 6

exothermic

Question 7

the change from a raw egg to fried egg is exothermic/endothermic reaction

Answer 7

endothermic

Question 8

A molecule of ethane and a molecule of iodine react. What needs to happen for the reaction to occur.

Answer 8

The ethane and iodine molecules must collide.
They must collide with more energy than the activation energy.