Which of the following equations is NOT needed to find the lattice energy of Al2O3 using the Born-Haber cycle?  The standard states of Al and O are Al (s) and O2 (g).  Make sure you consider the process, the coefficients, the chemical IDs, and the states. a. Al+ (g) → Al2+ (g) + 1 e–  b. All of the equations shown here ARE needed. c. 2 Al3+ (s) + 3 O2- (s) --> Al2O3 (s) d. 2 Al (s) + 3/2 O2 (g) → Al2O3 (s) e. Al (s) → Al (g)

For which of the following four compounds is the lattice energy most exothermic? CsCl MgCl2 AlCl3 NaCl

I only need help with the highlighted ones please

b. ,mass 4. If a pool and a cup of water had the same temperature, which would have greater therma energy? Why? The pool because

Part A Calculate the enthalpy of the reaction 2NO(g) + O2(9)–→2NO2(9) given the following reactions and enthalpies of formation: A N2(9) + O2(g)→NO2(9), AfH = 33.2 kJ mol 1 B. N2 (9) + ¿O2(9)→NO(g), AfHß = 90.2 kJ mol 1 Express your answer with the appropriate units. • View Available Hint(s) ? A¢H° = Value Units Submit

The combustion of 0.1566 g benzoic acid increases the temperature of a bomb calorimeter by 2.51°C. Calculate the heat capacity of this calorimeter. (The energy released by combustion of benzoic acid is 26.42 kJ/g.) Heat capacity = kJ/°C A 0.2195-g sample of vanillin (Cg H3 O3) is then burned in the same calorimeter, and the temperature increases by 3.21°C. What is the energy of combustion per gram of vanillin? Energy = kJ/g Per mole of vanillin? Energy = kJ/mol

Propane is a gas commonly used to fuel gas grills and camping stoves.  The structure of propane is shown below. Write the balanced chemical equation for the combustion of propane.  Draw out lewis dot structures to represent all molecules of all products and reactants in this reaction.  The number of each molecule should be reflected in the balanced equation.  Calculate the heat of combustion for propane using the bond enthalpies in the table.  1.00 mol of propane is used to roast marshmallows.  It was determined that the amount of energy absorbed by the marshmallows was only 800 kJ.  Explain this observation.

calculate the heat of fusion (red part) given the heat capacity (83.2 Celsius) and other important data.

KI has a lattice energy of -649 kJ/mol. Consider a generic salt, AB, where A²+ has the same radius as K+, and B²- has the same radius as I¯. Estimate the lattice energy of the salt AB. lattice energy of AB: kJ/mo-

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