1. The average thermal effect of the reaction 3FeO(cr) H2O(g)↔Fe3O4(cr) H2(g) in the temperature range from 700 to 800 C is equal to - 70.63 kJ. At a temperature of 801 C, the total pressure at equilibrium is 4.293 kPa, the partial pressure of hydrogen is 1.96 kPa. What is the pressure of water vapor at a temperature of 700 C if the partial pressure of hydrogen at this temperature is 1.986 kPa? Answer: 1.04 kPa

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