13. Chemical Energetics

Question 1

What is the process of exothermic?

Answer 1

1. Reactions give out thermal energy to surroundings
2. Temperature of reaction mixture will increase
3. container will feel warm

Question 2

What is the process of endothermic?

Answer 2

1. Reactions absorb thermal energy from surrounding
2. Temperature of the reaction mixture will decrease
3. container will feel cool

Question 3

Does the curve goes up or down for exothermic reaction?

Answer 3

goes up

Question 4

How to determine if reaction has stopped or not from the graph?

Answer 4

the maximum or minimum point of the graph

Question 5

Examples for endothermic reaction?

Answer 5

1. Thermal decomposition
2. Photosynthesis
3. Evaporation
4. Boiling
5. Melting

Question 6

Examples of exothermic reaction?

Answer 6

1. Neutralisation
2. Combustion
3. Respiration
4. Freezing
5. Condensation