To convert joules (J) to kilojoules per mole (kJ/mol), you need to divide the given value in joules by the Avogadro constant (6.022 × 10^23 mol^-1). This conversion allows you to express the energy per mole of a substance.
The formula for the conversion is as follows:
Energy in kJ/mol = Energy in J / (6.022 × 10^23 mol^-1)
For example, let's say you have an energy value of 5000 J and you want to convert it to kJ/mol:
Energy in kJ/mol = 5000 J / (6.022 × 10^23 mol^-1)
Calculating the result:
Energy in kJ/mol = 8.30 × 10^-21 kJ/mol
Therefore, 5000 J is equivalent to approximately 8.30 × 10^-21 kJ/mol.