enthalpy unit

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tierra parker 1J
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enthalpy unit

Postby tierra parker 1J » Tue Feb 05, 2019 9:45 pm

what are the units for enthalpy, is it just joules?

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Joined: Fri Sep 28, 2018 12:24 am

Re: enthalpy unit

Postby Danielle_Gallandt3I » Tue Feb 05, 2019 10:04 pm

I think it depends, because the standard enthalpy of formation is in J/mol, so I think it changes with the "type" of enthalpy you are considering

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Joined: Fri Sep 28, 2018 12:20 am

Re: enthalpy unit

Postby Philipp_V_Dis1K » Wed Feb 06, 2019 10:08 am

Usually one assumes that a certain amount of energy (joules) is released or used up during a reaction of 1 mole. Therefore it can be J/mol or kJ/mol

Sarah Fatkin 4I
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Re: enthalpy unit

Postby Sarah Fatkin 4I » Wed Feb 06, 2019 10:18 am

Most of the problems we do require enthalpy in joules, because delta(H) = detla(U) + pV, where detla(U) is in joules and pV can easily be converted into joules with the constant 101.325 J/(atm*L). Also, delta(H) is just H[final] - H[initial], both of which are in joules. Hope this helps!

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