Thermochemistry?

Question

Caculate for Change H reaction for the combusion of glucose (C6H12O6) using heat of formation. Is this reaction endothermic or exothermic?

Answer 1

First, write the equation for the combustion of glucose:

C6H12O6(s) + 6 O2(g) --> 6 CO2(g) + 6 H2O(l)

In order to calculate delta H for this reaction, you'll need a table of enthalpies of formation of compunds.

Delta H for any reaction is the sum of the enthalpies of formation of the products minus the sum of the enthalpies of formation of the reactants. So you'll take six times the enthalpy of formation of CO2 and add that to 6 times the enthalpy of formation of water. Add those together and subtract the enthalpy of formation of glucose.