Gibb's Free Energy: Spontaneous Reactions at High Temperatures

[rajakavuru]

Hello,
If a reaction is spontaneous when calculated using Gibb's Free Energy formula,
Delta G = Delta H - (T*Delta S)

Does it mean the reaction will occur at impossible temperatures even (such as 999999999999999999999999 degrees Kelvin)

for ex:
H2O(g) C(s) --> CO(g)+H2(g)
Delta H = 135.5 kJ
Delta S = .1488 kJ
T = 1173 Kelvin

Delta G = -39 (if delta G is negative, the reaction is spontanious, according to Gibb's Free Energy)

since this reaction is spontanious, will this occur at 99999999999999999 degrees kelvin even? (is this possible?)

 

[neeraj93]

Theoretically, it is. But since you cannot achieve such a temperature, it has no practical significance.

 

[Borek]

No, it doesn't mean that. When temperature rises other effects/reactions tend to take place and they replace initial system.

http://en.wikipedia.org/wiki/Orders_of_magnitude_(temperature )