Solution of the problem 296 of the collection on genera

Solution of the problem 296 of the collection on genera

296. Calculate ΔHº298 the formation of MgCO3 (k) at 298 K, using the following data:

C (graphite) + O2 (g) = CO2 (g); ΔHº298 = -393.5 kJ

2Mg (к.) + O2 = 2MgO (к.); ΔHº298 = -1203.6 kJ

MgO (k) + CO2 (g) = MgCO3 (q); ΔHº298 = -117.7 kJ

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