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acherentia
Oct27-09, 06:18 PM
The \delta Hcombustion for alanine is -1577kJ mol-1 and the \delta Hcombustion for urea is -631.6kJmol-1. The product of biological combustion of alanine is urea ((H2N)2CO) and not N2.

Balance the following: (provided balanced)

2 C3H7NO2 + \frac{15}{2}O2\rightarrow 6CO2 + 7H2O + N2

1 (H2N)2CO + \frac{3}{2}O2 \rightarrow CO2 + 2H2O +N2

2C3H7NO2 + 6O2 \rightarrow 5CO2 + 5H2O + (H2N)2CO

What is the amount of energy available from the biological oxidation of 1.000 g of alanine
C3H7NO2?

n C3H7NO2 per 1.000 g = 0.011 mol

\deltaHrxn 3= \deltaHrxn 1 - \deltaHrxn 2 = -945.4 kJ mol-1 ...............this is for 2 moles

Amount of energy available is 0.011* (-945.4 / 2) ???? Can you please let me know if this should be the answer?