Question

It is always difficult to determine the change in internal energy. Chemists have developed quantity enthalpy H related to energy. The change in enthalpy is denoted by H and the unit of change in molar enthalpy is


a. J/mol
b. kJ/mol
c. Q
d. J
e. kJ

Answer 1

Answer: b. kJ/mol

Reason: Enthalpy is an energy term, so molar enthalpy (enthalpy per mole) has units of energy per amount: J·mol⁻¹ (or commonly reported as kJ·mol⁻¹).