AAARRRGGGG. H with a little circle at the top right is NOT degrees.
I will shift to more conventional symbols
Hr (heat of reaction,or reaction enthalpy)= -8.39E3 KJ
Hcombustion= -4.25 kJ/mole
Notice the units for heat of combustion. It is commonly on a per mole basis, but can be on a per mass, or per volume basis. Heats of reaction are usually in heat units, based on the reaction, but it is not unusual to find them in a per mole or per gram basis. In this instance, I assumed from the wording it was based on the amounts in moles of the coefficents. Better wording would have been desired.
In an experiment liquid hexane, C6H14 (l) is combusted completely to produce CO2(g) and H2O (l) according to the equation:
2 C6H14 (l) + 19 O2(g) -> 12 CO2(g) + 14H2O (l)
The change in H degrees for the reaction is -8.39 x 10^3 KJ. Calculate change in H degrees for C6H14 (l).
1 answer
1 answer