dHrxn = (n*dHproducts) - (n*dHreactants)
dSrxn = (n*dSproducts) - (n*dSreactants)
Then dGrxn = dHrxn - TdSrxn
If dGrxn is - the products are favored.
Show your work if you gets stuck.
4. Calculate the Gibbs’ free energy change for the reaction
Mg(s) + H2O(g) → MgO(s) + H2(g)
carried out at 100ºC given the data below. Under these conditions is this
reaction product favoured?
ΔHºformation (kJ mol^-1)
MgO(g) -602
H2O(g) -242
H2(g) 0
Mg(s) 0
Sºformation (J K^-1 mol^-1)
MgO(g) 26.9
H2O(g) 188.7
H2(g) 130.6
Mg(s) 32.7
1 answer
1 answer