a. Estimate the error due to the inequality of the temperatures of the reactant and products in the previous example.
b. Assume that the mass of iron wire burned in the combustion experiment of the previous example is 8.0 mg. The energy of combustion of iron is −6.68 kJg^{−1}. Find the percent error in Example 2.34 caused by neglect of the energy of the wire’s combustion.