Answer:
It is an exothermic reaction, where an energy of 315 kJ is released to the surroundings.
Explanation:
A chemical reaction is endothermic when it absorbs energy from the environment, that is, heat is transferred from outside to inside the system. The energy requirement (energy absorption) is due to the fact that the products obtained have greater energy than the initial reagents. This in a chemical reaction is usually shown as the sum of energy needed in the reagents for the reaction to occur.
On the other hand, an exothermic reaction is one where energy is released from the system to the environment in the form of heat. In other words, the products have less energy than the initial reagents, so some of that initial chemical energy is released into the environment in the form of heat. That is why a term with an energy value usually appears in products.
In this case, you can see that<u><em> it is an exothermic reaction, where an energy of 315 kJ is released to the surroundings.</em></u>