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
b) kJ/mol
are you correct?
Yes, I am correct. The unit of change in molar enthalpy is typically expressed in kJ/mol.
To determine the unit of change in molar enthalpy (△H), we need to understand the definition of enthalpy and the units used for energy.
Enthalpy (H) is a thermodynamic property that describes the total energy of a system, including both its internal energy and the energy required to maintain constant pressure. It is often used to measure the heat flow in chemical reactions.
The unit of energy in the International System of Units (SI) is the Joule (J). However, in chemistry, it is common to work with larger quantities of energy, so the kilojoule (kJ) is frequently used instead.
Since △H represents a change in enthalpy, its unit will be the same as the unit used for enthalpy itself. Therefore, the correct answer is (b) kJ/mol, as it represents a change in molar enthalpy.
So, the unit of change in molar enthalpy (△H) is kJ/mol.