Exothermic And Endothermic Reactions

Question 1

Exothermic reaction notes

Answer 1

• energy is released into the atmosphere
• bonds are made = reduce energy
• enthalpy is negative = reactants have more energy than products
• temp of surroundings increase

Question 2

Examples of exothermic reaction

Answer 2

• combustion
• freezing
• condensing

Question 3

Endothermic reactions notes

Answer 3

• energy is taken in from surroundings
• used to break bonds
• increase of energy in products
• enthalpy is positive
• temp of surrounding decreases

Question 4

Example of endothermic reactions

Answer 4

-boiling
-melting
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