Delta H reaction refers to the change in enthalpy during a chemical reaction at constant pressure. It can be either positive (endothermic - absorbs heat) or negative (exothermic - releases heat).
Endothermic Reaction: A type of chemical reaction that absorbs heat from its surroundings.
Exothermic Reaction: A type of chemical reaction that releases heat into its surroundings.
Thermochemistry: The study of the energy and heat associated with chemical reactions.
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