Chronology Current Month Current Thread Current Date
[Year List] [Month List (current year)] [Date Index] [Thread Index] [Thread Prev] [Thread Next] [Date Prev] [Date Next]

Re: [Phys-L] reaction with small TΔS



Thank you very much.! It preserves molecule number.

2014-06-15 21:27 GMT-03:00, John Denker <jsd@av8n.com>:
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.

_______________________________________________
Forum for Physics Educators
Phys-l@phys-l.org
http://www.phys-l.org/mailman/listinfo/phys-l



--
Diego Saravia
Diego.Saravia@gmail.com
NO FUNCIONA->dsa@unsa.edu.ar