Enthalpy units

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Riya Sood 4G
Posts: 160
Joined: Sat Aug 24, 2019 12:18 am

Enthalpy units

Postby Riya Sood 4G » Sun Feb 02, 2020 4:48 pm

When calculating enthalpies, using Hess's Law, do we use the units kj to denote delta H?

Savannah Mance 4G
Posts: 107
Joined: Fri Aug 30, 2019 12:17 am

Re: Enthalpy units

Postby Savannah Mance 4G » Sun Feb 02, 2020 4:52 pm

In the equations that Lavelle did in class when he was showing different methods to find enthalpy he used kJ with Hess's Law.

Christine Honda 2I
Posts: 116
Joined: Sat Sep 14, 2019 12:17 am

Re: Enthalpy units

Postby Christine Honda 2I » Sun Feb 02, 2020 4:55 pm

It should be in terms of Joules whether that is J or kJ. It can also be in J/mol or kJ/mol depending on the context.

Rory Simpson 2F
Posts: 106
Joined: Fri Aug 09, 2019 12:17 am

Re: Enthalpy units

Postby Rory Simpson 2F » Sun Feb 02, 2020 5:03 pm

Enthalpy for a reaction would typically be given in joules or kilojoules. For molar enthalpy, standard reaction enthalpy or standard formation enthalpy, it would be given in J/mol or kJ/mol.

Daniela Shatzki 2E
Posts: 53
Joined: Sat Aug 24, 2019 12:16 am

Re: Enthalpy units

Postby Daniela Shatzki 2E » Sun Feb 02, 2020 5:50 pm

I think kJ or J is okay as long as it is consistent

sarahartzell1A
Posts: 56
Joined: Fri Sep 28, 2018 12:17 am

Re: Enthalpy units

Postby sarahartzell1A » Sun Feb 02, 2020 7:46 pm

Typically kj or J


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