Which of the following is an exothermic reaction?

Question

a. burning wood
b. making ice cubes
c. baking cake
d. condensation of rain from water vapors

Answer 1

a. burning wood - exothermic.  Combustion reactions are exothermic as more heat energy is liberated than added

b. making ice cubes - exothermic. Heat is released from liquid water to produce ice

c. baking cake - endothermic.  Heat is added to bake the cake

d. condensation - exothermic.  Heat is lost from the vapor to form liquid

Answer 2

Which one of them produces heat?