Question

multiple choice 2 points
the heat released or absorbed during a chemical reaction at standard conditions is
enthalpy
entropy
exothermic
endothermic

Explanation:

Enthalpy is the heat - related quantity for reactions at constant pressure (standard conditions). Entropy is a measure of disorder. Exothermic and endothermic describe the nature of heat flow in a reaction, not the quantity itself.

Answer:

A. Enthalpy