exothermic/endothermic

[Ruiting Jia 4D]

Besides the reaction equation, are there any other ways we can identify whether a reaction is endothermic or exothermic? And are there exceptions to being able to identify this from the equation?

[Elaine Pham 2E]

If you are given delta H of the equation, you can identify if the reaction is endothermic or exothermic. If delta H (which represents the change in enthalpy) is positive, then it is an endothermic reaction. If delta H is negative, then it is an exothermic reaction since energy is being released, not absorbed.

[Christine Chen 1H]

Often times, delta H will be given to determine whether a rxn is endothermic or exothermic. Positive delta H = endothermic; Negative delta H = exothermic.

[Katelyn Phan 2A]

You can determine it based on the sign of delta h (enthalpy). You can also tell from the description of the reaction; whether or not energy is required or released.