Worksheet: Hess Cycles Using Reaction Energies
In this worksheet, we will practice calculating reaction enthalpies by applying Hess's law to reaction cycles based on standard enthalpy changes.
Calculate the standard molar enthalpy of formation of from the following data:
Calculate for the process from the following information:
The following sequence of reactions occurs in the commercial production of aqueous nitric acid: What is the total energy change for the production of one mole of aqueous nitric acid by this process?
Using the data below, calculate to 4 significant figures the standard molar enthalpy of combustion of ethanol.
The standard molar free energy changes for three reactions are shown in the table.
|Standard Molar Free Energy Change (kJ/mol)|
Calculate, to the nearest kilojoules per mole, the standard free energy of formation for phosphoric acid.
A Hess cycle may be constructed from the standard reaction enthalpies of the three related reactions: Using this thermochemical data, calculate the value for the reaction .