Assignment:
Question 1. Calculate delta H for the following reaction:
The reduction of aluminum oxide by hydrogen gas:
Al2O3(s) + 3H2(g) ------- 2Al(s) + 3H2O(g)
Question 2. Solve for enthalpy using Hess's Law.
The standard heat of combustion of liquid ethyl alcohol is -227 kcal/mol and that of acetic acid is -209 kcal/mol. The equations are:
C2H5OH(l) + 3O2(g) ------- 2CO2(g) +H2O(l) delta H = -227 kcal
HC2H3O2(l) + 2O2(g) ------2CO2(g) + 2H2O(l) delta H = -209 kcal
What is the heat of reaction for the oxidation of ethyl alcohol to acetic acid?
C2H5OH(l) + O2(g) -------- HC2H3O2(l) + H2O(l)
Question 3. How much heat energy is given off when one kilomole of hydrogen gas (H2) at 25 degrees Celsius and 1 atm is combined with enough oxygen (O2) to make liquid water at 25 degrees Celsius?
H2(g) + 1/2 O2(g) ------ H2O(l) delta H = -68.320
Question 4. Calculate the heat of combustion for the reaction in which ethane combines with oxygen to give carbon dioxide and water vapor. C2H6 + 7/2 O2 ----- 2CO2 +3H2O
a.) 2 C(s) + 3H2(g) ---- C2H6(g) delta H = -20.2 Kcal.
Provide complete and step by step solution for the question and show calculations and use formulas.