enthalpy units

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enthalpy units

Postby 005199302 » Tue Feb 12, 2019 11:52 am

When solving for the change of enthalpy of a reaction either using bond enthalpies or enthalpy of formation, should our answer be in kj/mol or just kj?

Grace Kim 1J
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Re: enthalpy units

Postby Grace Kim 1J » Tue Feb 12, 2019 12:00 pm

If it's written as kJ/mol, it's usually used when you are describing the enthalpy of a reaction for 1 mole of a reactant/product. You also use kJ/mol when dealing with various types of enthalpies associated with individual molecules (heat of vaporization, heat of fusion, q = mcT, etc.) Usually your answer is in KJ when you are calculating the enthalpy of a particular reaction for a given number of moles of substance.

Hope that made sense!

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