None of these are valid answers

The rates of exothermic reactions are faster than the rates of endothermic reactions

Endothermic reactions are more common than exothermic reactions

The rates of endothermic reactions are faster than the rates of exothermic reactions

Exothermic reactions are more common than endothermic reactions

Magma cooling to form igneous rocks

Ice melting

Water boiling

Dry ice becoming gaseous carbon dioxide

Exothermic reactions have a lower activation energy compared to the reverse endothermic reactions

Only endothermic reactions require energy in order to take place

Endothermic reactions result in products with a lower internal energy

Condensation of steam is an endothermic reaction

is negative

is positive

Heat is being gained from the environment

There must be a catalyst involved

The molecular bonds of the compound are being broken

Exothermic reaction, with heat being released

Endothermic reaction, with heat being absorbed

Endothermic reaction, with heat being released

Exothermic reaction, with heat being absorbed

It depends on the temperature at which the reaction occurs

is negative

is positive

Heat is being gained from the environment

There must be a catalyst involved

is negative

is positive

Heat is being gained from the environment

There must be a catalyst involved