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Topic: [CHMA] Standard Enthalpies of Formation (Clarification)  (Read 1989 times)

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Offline GreenAssailant

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[CHMA] Standard Enthalpies of Formation (Clarification)
« on: December 10, 2011, 09:41:15 PM »
The standard enthalpy of formation for MgSO4?

Attempt:
Mg(s) + 1/8 S8(g) + 2 O2(g) --> MgSO4

However, I am not sure if the bold part is correct. What is the uncombined form of sulphur?

Offline Borek

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Re: [CHMA] Standard Enthalpies of Formation (Clarification)
« Reply #1 on: December 11, 2011, 04:22:42 AM »
S8, even if it is not uncommon to balance reactions and do the calculations as if it was just S.

But I don't think it will be still S8 in gaseous form.
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