Question

Give the meaning of a DH value of –400 kJ in a reaction.

Answer 1

B for plato. The reaction release 400kJ of heat. It's exothermic which means it releases heat.

Answer 2

There are two ways in which the meaning of DH value of –400 kJ in a reaction can be explained. The first way is that the reaction gives out 400 kJ of energy via the process of heat release. The other way that it can be easily explained is that it is an exothermic reaction. I hope the answer has helped you.