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On 06/15/2014 04:42 PM, Diego Saravia wrote:
speaking about chemical reactions, do anyone knows about a chemical
reaction with hight Delta H and very low or cero Delta S
What about this:
O2 + N2 <--> 2NO
The ΔH is 24 times bigger than the TΔS at 300K.
Here are the numbers:
H S
kJ/mol J/mol/K
N2 0 191.5
O2 0 205
NO 90.2 210.7
2NO 180.4 421.4
ΔH ΔS TΔS
kJ/mol J/mol/K kJ/mol
delta 180.4 24.9 7.5
ratio 24.1
Raw data taken from
http://www.mrbigler.com/misc/energy-of-formation.PDF
====================
You can probably do better; this is just the first thing
that popped into my mind.
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