Exothermic reactions release heat to the surroundings, so heat energy is written as a product. If an exothermic reaction is a reversible reaction, then the reverse reaction, in which the products reform the reactants, will be endothermic.
Endothermic reactions absorb heat from the surroundings, so heat energy is written as a reactant. If an endothermic reaction is a reversible reaction, then the reverse reaction, in which the products reform the reactants, will be exothermic.
Observe the 2 reactions below:
Which 4 statements below are TRUE of reactions A and B? Choose the 4 correct answers.
a
The forward reaction in reaction A is exothermic.
b
The forward reaction in reaction A is endothermic.
c
The reverse reaction in reaction A is endothermic.
d
The reverse reaction in reaction A is exothermic.
e
The forward reaction in reaction B is exothermic.
f
The forward reaction in reaction B is endothermic.
g
The reverse reaction in reaction B is exothermic.
h
The reverse reaction in reaction B is endothermic.
The correct statements are:
a) The forward reaction in reaction A is exothermic.
d) The reverse reaction in reaction A is exothermic.
f) The forward reaction in reaction B is endothermic.
g) The reverse reaction in reaction B is exothermic.