What is the term used for the study of heat changes in chemical reactions?
A
Electrochemistry
B
Thermochemistry
C
Photochemistry
D
Stoichiometry
Correct Answer: Option B — Thermochemistry
Explanation:
Thermochemistry is the branch of chemistry that studies the heat energy associated with chemical reactions and physical transformations. It helps determine whether reactions are exothermic or endothermic based on enthalpy changes.