Question

Standard heat of formation of CO2, H20 and HCOOH are -26.4, -68.3 and -97.8
KCal respectively. Calculate the standard heat of following reaction.
HCOOH + 0 → CO2 + H2O AH°= ?
+
0,-​

Answer 1

The standard enthalpies of formation of CO2 (g) , and HCOOH (I) are - 393.7kJ/mol and - 409.2kJ/mol respectively.

Combustion of glucose:

C 6H 12 O 6 +6O 2 →6CO 2 +6H 2O

ΔH ccombustio = (6×ΔH fCO 2+6×ΔH ff O)−ΔH

fC 6H 12 O 6

=(6×−400+6×−300)−(−1300)

=−2900 kJ/mol

=− 1802900 kJ/g

=− 16.11 kJ/g

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