Gaseous SO2Cl2 reacts with liquid water to form hydrogen chloride gas and liquid sulfuric acid. Using data tabulated in Appendix G of your text, calculate the enthalpy change, in units of kJ/mol, for the formation of 2 mol of liquid sulfuric acid. Enter your answer in decimal notation using 3 significant figures. b. A 10.0 g sample of liquid ethanol (C2H5OH(l)) is placed inside a constant-pressure calorimeter with heat capacity 8.4 kJ/oC. After partial combustion of the ethanol in the presence of excess oxygen, the temperature of the calorimeter increases by 6.69 oC. Using this information and the data tabulated in Appendix G of your text, calculate the mass, in units of g, of ethanol that must have combusted. Enter your answer in decimal notation using 3 significant figures. c. Consider the reaction 2 S(g) + 3 O2(g) → 2 SO3(g). Using the standard enthalpies of formation listed in Appendix G of your text and the bond energy of 498.4 kJ/mol in molecular oxygen, calculate the average sulfur-oxygen bond energy, in units of kJ/mol, in sulfur trioxide gas. Enter your answer in decimal notation using 3 significant figures.
Thermochemistry
Thermochemistry can be considered as a branch of thermodynamics that deals with the connections between warmth, work, and various types of energy, formed because of different synthetic and actual cycles. Thermochemistry describes the energy changes that occur as a result of reactions or chemical changes in a substance.
Exergonic Reaction
The term exergonic is derived from the Greek word in which ‘ergon’ means work and exergonic means ‘work outside’. Exergonic reactions releases work energy. Exergonic reactions are different from exothermic reactions, the one that releases only heat energy during the course of the reaction. So, exothermic reaction is one type of exergonic reaction. Exergonic reaction releases work energy in different forms like heat, light or sound. For example, a glow stick releases light making that an exergonic reaction and not an exothermic reaction since no heat is released. Even endothermic reactions at very high temperature are exergonic.
a. Gaseous SO2Cl2 reacts with liquid water to form hydrogen chloride gas and liquid sulfuric acid. Using data tabulated in Appendix G of your text, calculate the enthalpy change, in units of kJ/mol, for the formation of 2 mol of liquid sulfuric acid. Enter your answer in decimal notation using 3 significant figures.
b. A 10.0 g sample of liquid ethanol (C2H5OH(l)) is placed inside a constant-pressure calorimeter with heat capacity 8.4 kJ/oC. After partial combustion of the ethanol in the presence of excess oxygen, the temperature of the calorimeter increases by 6.69 oC. Using this information and the data tabulated in Appendix G of your text, calculate the mass, in units of g, of ethanol that must have combusted. Enter your answer in decimal notation using 3 significant figures.
c. Consider the reaction 2 S(g) + 3 O2(g) → 2 SO3(g). Using the standard enthalpies of formation listed in Appendix G of your text and the bond energy of 498.4 kJ/mol in molecular oxygen, calculate the average sulfur-oxygen bond energy, in units of kJ/mol, in sulfur trioxide gas. Enter your answer in decimal notation using 3 significant figures.
appendix G is the pic
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