QUESTION 3 30 points Save Answer For the reaction N2O4(g)= 2NO2(g), measurements

Question

QUESTION 3 30 points Save Answer For the reaction N2O4(g)= 2NO2(g), measurements of the composition of equilibrium mixtures gave KP= 0.144 at 25.0°C and K"p 0.321 at 35.0°C. Find Ho_aS®, and G° at 25°C for this reaction. Assume H° is constant over this temperature range. Do not use Appendix data. Rz 8.314 J/mol·K, T(K)=T(°C)+273.1. Please enter the Ho, andG" in kJ/mol in 3 significant figures, eg. if the answer is 0 kJ/mol, enter "O.00% Please enter thedSin J/mol-K in 3 significant figures, eg. if the answer is 0 J/mol-K, enter'.00": kJ/moldHo_ kJ/mol, AS°- J/mol-K

Explanation / Answer

N2O4(g) <====> 2NO2(g)

ln(k2/k1) = DHrxn/R[1/T1 - 1/T2]

ln(0.321/0.144) = (x/8.314)((1/298.1)-(1/308.1))

DH0 = 61.2 kj/mol

DS0 rxn = (2*s0f,NO2)-(1*s0f,N2O4)

           = (2*240)-(304.2)

            = 176 j/mol.k

DG0 = DH0-TDS0

     = 61171 - (298*175.8)

     = 8.78 kj/mol

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