1 The standard enthalpy (heat) of formation is ________.A) The change in enthalpy that accompanies the formation of one gram of a compound in its standard state from elements in their standard states. B) The change in enthalpy that accompanies the formation of one kilogram of a compound in its standard state from elements in their standard states. C) The change in enthalpy that accompanies the formation of one liter of a compound in its standard state from elements in their standard states. D) The change in enthalpy that accompanies the formation of one mole of a compound in its standard state from elements in their standard states. 2 Elements in their standard state always have standard enthalpies of ________. (23.0K)A) -396 kJ/mol B) 33.2 kJ/mol C) 0.0 kJ/mol D) 396 kJ/mol 3 What heat is liberated in the formation of 10.0 grams of sulfur hexafluoride, SF6, from the elements sulfur and fluorine? (35.0K)A) 83.5 kJ B) 1220 kJ C) 12,200 kJ D) 17,800 kJ 4 From the following data, H2 (g) + Cl2 (g) → 2HCl(g) ΔH°v = -185 kJ, 2H2 (g) + O2 (g) → 2H2O(g) ΔH° = -483.7 kJ, calculate ÎH° for the following reaction. 4HCl(g) + O2 (g) → 2Cl2 (g) + 2H2 O(g)A) 299 kJ B) -114 kJ C) -299 kJ D) 114 kJ 5 Calculate ΔH° for the following reaction. The standard enthalpies of formation for the two reactants and two products are, in order, -1118, -110.5, -272, -393.5 Fe3 O4 (s) + CO(g) → 3FeO(s) + CO2 (g)A) -263 kJ B) 54 kJ C) 19 kJ D) -50 kJ