43. Calculate the change in entropy during the reaction Pb(s) I2(s)=PbI2(s) in a galvanic cell at 298 K and 1.0133*105 Pa, if the emf of the element is 0.662 V, the heat of formation of PbI2(s) is 175, 1 kJ/mol. Calculate the heat of this reaction when it occurs reversibly. Draw a conclusion about the possibility of spontaneous occurrence of this process.
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