Question

Please show work

63 Use Hess's law to calculate ΔGTXn using the following information . NO(g) + 0(g) → NO2(g) 2。3(g) → 3。2(g) 02(g) → 2 0(g) NO(g) + O3(g) → NO2(g) + O2(g) AGorxn = ? Gorxn +489.6 kJ Grxn = +463.4 kJ ΔGTXn--I 99.5 kJ A) +753.5 kJ B) +277.0 kJ C)-676.0 kJ D) -1152.5 kJ E) -225.7 kJ 64) Calculate ΔGrn at 298 K under the conditions shown below for the foll G"--180.8 kJ 2 Hig(g) + O2(g) → 2 HgO(s)

Answer 1

Lets number the reaction as 0, 1, 2, 3 from top to bottom

required reaction should be written in terms of other reaction

This is Hess Law

required reaction can be written as:

reaction 0 = -0.5 * (reaction 1) -0.5 * (reaction 2) +1 * (reaction 3)

So, deltaGo rxn for required reaction will be:

deltaGo rxn = -0.5 * deltaGo rxn(reaction 1) -0.5 * deltaGo rxn(reaction 2) +1 * deltaGo rxn(reaction 3)

= -0.5 * (489.6) -0.5 * (463.4) +1 * (-199.5)

= -676.0 KJ

Answer: C

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