For the following processes, identify if they are endothermic or exothermic. Then, explain how the energy of the system changes. (Listed below)

Question

For the following processes, identify if they are endothermic or exothermic. Then, explain how the energy of the system changes.

1. melting ice
2. fireworks exploding
3. photosynthesis
4. combustion of gasoline

Answer 1

1. Melting ice is an endothermic Process.

Ice ia a solid . To be come liquid which has more kinetic and Potential energy ice will have to take in energy. So ,melting is endothermic

Systems energy increases

2.fireworks exploding - exothermic

As the energy is released during explosion.

Systems energy decreases

3.Photosynthesis - Endothermic process

Sunlight is taken in to prepare food by the plant during photosynthesis. So it is endothermic.

Systems energy Increases

4.Combustion of Gasoline - it is an exothermic process. Energy is released when gasoline burns in oxygen (combustion). So it is Exothermic

Systems energy decreases