reactions for which the enthalpy change will be sure to specify states such as (aq) or (s). If a box is not needed, leave it blank.) a. Hf for solid copper(I) oxide. b. the standard enthalpy of combustion of liquid butanol, C4H9OH(l). c. the standard enthalpy of neutralization of potassium hydroxide solution by hydrochioric acid. d. the enthalpy of combustion of liquid benzene, C0H6(l). C6H6(l)+ e. the enthalpy of solution of solid ammonium lodide