1- Calculate the change in Gibbs free energy for each of the following sets of ΔH ∘ rxn , ΔS ∘ rxn , and T .
Part A : ΔH ∘ rxn =− 122kJ ; ΔS ∘ rxn = 248J/K ; T= 298K
Part B : ΔH ∘ rxn = 122kJ ; ΔS ∘ rxn =− 248J/K ; T= 298K
Part C : ΔH ∘ rxn =− 122kJ ; ΔS ∘ rxn =− 248J/K ; T= 298K Express your answer using two significant figures.
Part D : ΔH ∘ rxn =− 122kJ ; ΔS ∘ rxn =− 248J/K ; T= 562K Express your answer using two significant figures.
Part E : Predict whether or not the reaction in part A will be spontaneous at the temperature indicated.
Part F :Predict whether or not the reaction in part B will be spontaneous at the temperature indicated.
Part G : Predict whether or not the reaction in part C will be spontaneous at the temperature indicated.
Part H :Predict whether or not the reaction in part D will be spontaneous at the temperature indicated.
... The definition of the Gibbs free energy change is: ∆G = ∆H - T∆S, where ∆H is the enthalpy change of the system, T is the temperature in Kelvin, and ...
... and with right graph above). Notice that change of the Gibbs free energy with pressure of solid sample is much smaller than change with temperature. ...
... And since the Gibbs function is a "state function" and forms exact differential, find a simple expression for the change of entropy with respect to pressure ...
... You can also understand why minus the change in the Gibbs energy is the maximum amount of work you can extract from the system using the thought experiment of ...
... constant volume, so if the material expands by Delta V the systems's volume changes by: ... And the total entropy change is ... where G = E + PV -TS is the Gibbs energy ...
Methods of Finding DeltaG and K (Gibb's Free Energy and Equilibrium Constant) from ... at any given point is related to the free energy change under standard ...
... to change the pressure if the temperature is changed to make ... the liquid and the vapor, we must change P by ... dT and P + dP, then you have that the changes in the ...
