Question

The human body “burns” glucose (C6H12O6) for energy.
a. Write a balanced chemical reaction for the complete combustion of glucose to CO2(g)
and H2O(l) such that the stoichiometric coefficient for glucose is 1.
b. When 1.00 g of glucose are completely burned at 298.15 K and 1 bar of pressure,
15.7 kJ are released. Calculate the ÄH0
f
of glucose.

Answer 1

C6H12O6 + 6O2 ==> 6CO2 + 6H2O + 15.7 kJ
dHfrxn = (n*dHf products) - (n*dHf reactants)
15.7 kJ/mol = [(6*dH CO2)+(6*dH H2O)] - (0 + dH glucose).
Solve for dH glucose.

Answer 2

Excellent