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Unformatted text preview: 23. (3 points) Write the chemical equation, including phases, that would correlate with the standard enthalpy of formation of NaBrO 4 (s), sodium perbromate. 24. (2 points) Write the chemical equation, including phases, whose reaction enthalpy would correlate with the molar I-I (iodine - iodine) bond energy. 25. (2 points) Skiers, climbers, and others use hot packs for warmth, based on the crystallization of sodium acetate. Circle the correct answer for each of the following questions. What is the sign of H for the crystallization process? What is the description of the process? 26. (5 points) The noble gas, krypton, has a normal boiling point of -153 C. The standard enthalpy of vapourization, H vap , is +9.08 kJ mol-1 . Assume that the volume of 1 mole of liquid krypton is negligible with respect to 1 mole of the gas and that the gas phase behaves like an ideal gas. Determine the following quantities for the phase transition of krypton liquid to krypton gas at its normal boiling point at constant...
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