Please help with a chemistry problem regarding thermodynamics!?

Reply Tue 3 Aug, 2010 10:15 pm
A plausible reaction for the production of ethylene glycol is:

2CO(g) + 3H2(g) ----- CH2OHCH2OH(l)

These thermodynamic properties of CH2OHCH2OH(l) at 25⁰C are given: H⁰f = -387.1 kJ/mol CH2OHCH2OH(l), and ∆G⁰f = -298.2 kJ/mol CH2OHCH2OH(l). Use these data, together with other thermodynamic data, to obtain a value of the standard molar entropy of CH2OHCH2OH(l), S⁰, at 25⁰C.
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Reply Tue 10 Aug, 2010 06:24 pm
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Reply Fri 3 Sep, 2010 07:30 pm
dG is represented by dH- TdS
or to adapt to this
dS = (dG-dH)/T

i don't have a calculator so i can't solve that in my head, but it should be right since dS is represented by J/molK
just remember to convert kiloJouls into jouls by multiplying the answer by 1,000 and that should be it.


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