Why are chemists interested in studying thermochemistry? a. Heat is often absorbed during reactions. b. Heat is often released during a chemical reaction, but never absorbed. c. Heat is often released during chemical reactions. d. Heat is often absorbed in a chemical reaction, but never released.

a. Heat is often absorbed during reactions.

c. Heat is often released during chemical reactions.

Explanation:

Thermochemistry -

The study of thermochemistry involve the change in the amount of heat , during any physical or chemical process , is referred to as thermodynamics .

The focus of thermochemistry is on the changing amount of energy in the form of heat , on the system with respect to the surroundings .

The process like boiling , melting , sublimation , may require energy or releases energy , and hence are studied under thermochemistry .

Hence , from the given question ,

The correct options are -  a , c.

i believe the answer is a.

increased stability in the completion of fluorine's outer shell.