Reaction 1 could be rewriten as: HCO3-(aq) <-----> H+(aq) + CO3^2-(aq) a. Calcul

ID: 522818 • Letter: R

Question

Reaction 1 could be rewriten as: HCO3-(aq) <-----> H+(aq) + CO3^2-(aq)

a. Calculate the theoretical values of DeltaG, DeltaH, and DeltaS for reaction 1 at 298K.

(info thats given in a table):

DeltaG for HCO3-(aq) -586.8 DeltaH for HCO3-(aq) is -692.0 and DeltaS for HCO3-(aq) 91.2

DeltaG for H+(aq) is 0, DeltaH for H+ is 0 and DeltaS for H+ is 0

DeltaG for CO3^2-(aq) is -527.8 , DeltaH for CO3^2-(aq) is -677.1 and DeltaS for CO3^2- is -56.9

b.) Calculate the % difference between your experimental values and the theoretical values.

deltaG = deltaG(H+) + deltaG(CO32-) - deltaG(HCO3-) = 0 + (-527.8) - (-586.8) = + 59.0 kJ

deltaH = deltaH(H+) + deltaG(CO32-) - deltaH(HCO3-) = 0 + (-677.1) - (-692.0) = + 14.9 kJ

deltaS = deltaS(H+) + deltaS(CO32-) - deltaS(HCO3-) = 0 + (-56.9) - (91.2) = -148.1 J/K= - 0.1481 kJ/K

From formula,

deltaG = deltaH - T deltaS = + 14.9 - 298(-148.1) = + 59.0338 kJ

% difference = (59.0338 - 59.0)*100 / 59.0338 = 0.0572 %

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