Question

L6_Q1:

1.Formulate a combustion reaction of benzene, C6H6, liquid.
2.Experiments performed on a bomb calorimeter found that the change in internal energy in this combustion process, calculated equal to ΔU = -3264kJ × mol ^ -1 assuming that the temperature during the experiment is 298K calculated the difference in percentages between the change in enthalpy and the change in energy.
3.
I. Formulate a formation reaction for the four alcohols (ethanol, methanol, propanol and butanol)
II. Why do you think it is impossible to directly measure the anthropology of the formation of these organic substances in a calorimeter?

Answer 1

Answer 1.

Combustion reaction of benzene means reaction of benzene with oxygen to produce carbon dioxide and water as product.

As benzene contains C and hydrogen only thus it is a hydrocarbon. And combustion of hydrocarbon always produces carbon dioxide (CO2) and water (H2O) there is also carbon and Carbon monoxide produces if the incomplete combustion takes place.

So here let complete combustion of benzene liquid takes place then,

2C₆H₆(l) + 15O₂(g) -----> 12CO₂(g) + 6H₂O(l)

There may be also CO and C produces if oxygen amount is low.