S Pontaneous? aub below, what is the lowest tempetature at which the following r

Question

S Pontaneous? aub below, what is the lowest tempetature at which the following reaction H2O(g) +Cs) H2)Co() H20 -241.8 0.00 0.00 -110.5 188.8 1922 5.7 130.6 28. Predict the change in entropy for the following reactions: 2N0 (g) + 02(g) 2NO2(g) a. b. 2NH3 (g) 202(g)N20 (g) +3H20(0) c. NH4NO3(s) 2H2O(g) + N20(g) Automobiles and trucks pollute the air with NO 2,000 °C, Keq for the reaction N2(g) 02(g) 2N0(g) is 4.1 × 10- and 1": 180.6 kJ/mol. Whatis the v 25 °c? Yo Ne Erom-thesedata,.calculatethevalueotaff'forthe 1.5x 105 at 430 °C to 23 at 1,000 °C. Erom-these-data, C to 23 at 1,000 °C. FrN029) decreases fom reactio 2T

Explanation / Answer

There is a easier way to solve this:

Ln(k2/k1)= -DH0/R (1/T2 - 1/T1)

Ln(k2/4.1x10-4) = -180.6kJ/mol/8.3145x10-3kJ/mol.K (1/298.15K - 1/2273.15K)

Lnk2 - Ln4.1x10-4= -63.29738958

Lnk2= -71.09674298

k2= 1.33x10-31

Your teacher uses another equation where finds DS. DS is not afected by temperature changes, so, first uses the equation with the data at 2000ºC and the Keq given. And then uses the same equation but puts DS in it to find Keq at 25. I think the way i did it is easier but i don´t know if you can use it or not.

Let me know if you have any doubt :)

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