Question

Question about the relationship between entropy, gibbs free energy, and enthalpy..

Answer 1

So I know that if a reaction has a negative enthalpy, positive entropy and a negative gibbs free energy, the reaction will be spontaneous at all temperatures.

All positive enthalpys, negative entropys, and positive gibbs, the reaction is not spontaneous.

But if a reaction has a negative entropy and a negative enthalpy....the reaction supposedly occurs at low temperatures, does it matter what sign the gibbs energy is?

Or if a reaction has a positive entropy and enthalpy, the reaction is supposedly occuring at high temperatures, does it also matter what sign it is?

Answer 2

@Somy

Answer 3

@Abhisar

Answer 4

see this... http://prntscr.com/6b8rq2

Answer 5

http://chem.wisc.edu/deptfiles/genchem/sstutorial/Text13/Tx131/tx131.html
u might want to check this out. the whole page is useful

Answer 6

http://prntscr.com/6b9rdr
for gibbs free energy

Answer 7

' When ΔG is negative, a process or chemical reaction proceeds spontaneously in the forward direction.

When ΔG is positive, the process proceeds spontaneously in reverse.

When ΔG is zero, the process is already in equilibrium, with no net change taking place over time. '

Answer 8

http://chemed.chem.purdue.edu/genchem/topicreview/bp/ch21/gibbs.php all you want to know is here
https://www.youtube.com/watch?v=XvuRJuXykyw he'll define each & once u hear it you might conclude their relationship & learn how to do calculation if you dont know :)

Answer 9

the sign of \(\Delta G\) will determine whether the reaction runs in the indicated direction, it is the \(result\) of the \(\Delta H\) and \(\Delta S\), not an additional factor.

Answer 10

Got it, gibbs is based on the temperature on my factors, thanks everyone

Answer 11

no problem :)