p (CO2) = p (CO2)Luft = 1.013 > p (CO2) NO! 4.5 bp 3.10. At which temperature will CaCO3 start to decompose in air? Assume that the caloric data do not depend on temperature. p (CO2) = KP = p (CO2)air = p (CO2)air = = T = 787 K 3.5 bp 3.11. At temperature will the equilibrium of the calcium carbonate decomposition shift from left to right, using the same assumptions like in 3.10.? KP = 1 T = 1.11·103 K 2 bp Task 4 36 bp 12 rp Selenium A rare trace element – 4.1. Calculate the standard potential for the conversion of selenate to H2Se, the respective biochemical standard potential at pH=7, as well as the free standard enthalpy, also at pH=7. 6 bp 4.2. Draw the configuration formula of this anion and show your way of calculation. assumption: only one Se-atom in compound X Possible elements: P, O, H configuration formula: only possibility: HSePO32-
p (CO2) = p (CO2)Luft = 1.013 > p (CO2) NO! 4.5 bp 3.10. At which temperature will CaCO3 start to decompose in air? Assume that the caloric data do not depend on temperature. p (CO2) = KP = p (CO2)air = p (CO2)air = = T = 787 K 3.5 bp 3.11. At temperature will the equilibrium of the calcium carbonate decomposition shift from left to right, using the same assumptions like in 3.10.? KP = 1 T = 1.11·103 K 2 bp Task 4 36 bp 12 rp Selenium – A rare trace element 4.1. Calculate the standard potential for the conversion of selenate to H2Se, the respective biochemical standard potential at pH=7, as well as the free standard enthalpy, also at pH=7. 6 bp 4.2. Draw the configuration formula of this anion and show your way of calculation. assumption: only one Se-atom in compound X Possible elements: P, O, H configuration formula: only possibility: HSePO32-
BW39-Theory-solutions.docx