Energy From Chemicals

Question 1

Exothermic reactions

Answer 1

• Exothermic reactions are reactions that release heat energy to the surroundings
• There will be a temperature rise in the surroundings

Question 2

Examples of exothermic reactions

Answer 2

• Neutralisation reactions
• Combustion of fuels
• Respiration
• Dissolving anhydrous salts in water (eg. CuSO4)
• Dissolving concentrated sulfuric acid in water

Question 3

Endothermic reactions

Answer 3

• Endothermic reactions are reactions that absorb heat energy from the surroundings
• There will be a temperature drop in the surroundings