At what temperature in °C will the system be at equilibrium?

For a chemical reaction, DH° = 23.87 kJ/mol and DS° = 485.43 J/mol·K. At what temperature in °C will the system be at equilibrium?

At what temperature in °C will the system be at equilibrium?
You've got to use the free energy equation, which is as follows:


DG = DH - TDS


(Where G is 'Gibb's free energy')


Reactions only occur if DG is negative - if it is a positive value, a reaction is not feasible in terms of energy and does not occur.


A system in equilibrium has DG=0.


So, to work out at what temperature your system will be at equilibrium, take DG to be 0, and input your values of DH (23.87) and DS (485.43) . Once you find T, that will be in Kelvin. Simply subtract 273 to convert to degrees Celsius :)
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