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10 Nov 2019
Hydrogen sulfide decomposes according to the reaction 2H_2S(g) rightarrow 2H_2(g) + S_2(g). For this reaction 298K, Delta S degree = 78.1 J/K, Delta H degree = 169.4 kJ, and Delta G degree = 146.1 kJ. What is the value of Delta G degree at 900 K? a) -69, 881 kJ b) 48.4 kJ c) 99.1 kJ d) 240 kJ e) 441 kJ In which of the following solutions would the solubility of calcium carbonate, CaCO_3, be the a) pure water b) 0.1 M calcium chloride c) 0.5 M sodium chloride d) 0.2 M sodium carbonate e) 0.1 M HCl The element oxygen was prepared by Joseph Priestley in 1774 by heating mercury (II) oxide. HgO(s) rightarrow Hg(l) + (1/2)O_2(g), Delta H degree = 90.84 kJ/mol. Estimate the temperature at which this reaction will become spontaneous under standard state conditions. S degree(Hg) = 76.02 J/K middot mol S degree(O_2) = 205.0 J/K middot mol S degree(HgO) = 70.29 J/K middot mol a) 108 K b) 430 K c) 620 K d) 775 K e) 840 K
Hydrogen sulfide decomposes according to the reaction 2H_2S(g) rightarrow 2H_2(g) + S_2(g). For this reaction 298K, Delta S degree = 78.1 J/K, Delta H degree = 169.4 kJ, and Delta G degree = 146.1 kJ. What is the value of Delta G degree at 900 K? a) -69, 881 kJ b) 48.4 kJ c) 99.1 kJ d) 240 kJ e) 441 kJ In which of the following solutions would the solubility of calcium carbonate, CaCO_3, be the a) pure water b) 0.1 M calcium chloride c) 0.5 M sodium chloride d) 0.2 M sodium carbonate e) 0.1 M HCl The element oxygen was prepared by Joseph Priestley in 1774 by heating mercury (II) oxide. HgO(s) rightarrow Hg(l) + (1/2)O_2(g), Delta H degree = 90.84 kJ/mol. Estimate the temperature at which this reaction will become spontaneous under standard state conditions. S degree(Hg) = 76.02 J/K middot mol S degree(O_2) = 205.0 J/K middot mol S degree(HgO) = 70.29 J/K middot mol a) 108 K b) 430 K c) 620 K d) 775 K e) 840 K
Sixta KovacekLv2
18 Mar 2019