1. Exothermic and
Endothermic
Processes

2. Exothermic or Endothermic?mw
Exothermic or Endothermic?
A burning match
O2 and C react (burn) to give CO2 and heat
Ice at -5oC, warms-up to 0oC, goes from solid to liquid, heats-up to 20oC
Liquid water at 80oC, cools-down to 20oC

3. Draw a graph for each of the above (4 graphs, turn-in)

4. Example: 2 chemical substances react and the products they yield have less energy A + B  AB
Energy of reactants
A + B
Energy
Energy of products AB
Time

5. To graph: A burning match O2 and C react (burn) to give CO2 and heat
Ice at -5oC, warms-up to 0oC, goes from solid to liquid, heats-up to 20oC
Liquid water at 80oC, cools-down to 20oC

6. Energy
Energy
Time
Time
# 1
Burning match
# 2

7. Energy
Energy
Time
Time
# 3
# 4