Gibs Free Energy and Enthalpy






Moderators: Chem_Mod, Chem_Admin

VivianaHF2L
Posts: 29
Joined: Fri Sep 28, 2018 12:20 am

Gibs Free Energy and Enthalpy

Postby VivianaHF2L » Fri Feb 22, 2019 1:06 pm

How does the negative enthalpy help prove that most spontaneous reactions are exothermic. In other words what are the connections between them?

Andre_Galenchik_2L
Posts: 69
Joined: Fri Sep 28, 2018 12:23 am

Re: Gibs Free Energy and Enthalpy

Postby Andre_Galenchik_2L » Fri Feb 22, 2019 3:33 pm

Using the equation Delta G = Delta H - T Delta S, knowing that the reaction is exothermic would increase the chances of Delta G being negative and thus spontaneous.

makenzie2K
Posts: 31
Joined: Fri Sep 28, 2018 12:20 am

Re: Gibs Free Energy and Enthalpy

Postby makenzie2K » Fri Feb 22, 2019 4:34 pm

As mentioned above, knowing that the deltaH value is negative makes the possibility of deltaG being negative possible. Though, in order for this to occur we must also know that T*deltaS is either some positive number OR a negative number that is LESS than deltaH (meaning deltaH>T*deltaS). In any other case, deltaG would not result in a negative number.


Return to “Gibbs Free Energy Concepts and Calculations”

Who is online

Users browsing this forum: No registered users and 1 guest