[Solidus]

Hey, I am new to this site and was wondering if you guys could help me with this task.

I conducted an experiment where i measured the time it took to evaporate 1 drop of gasoline and 1 drop of 2-propanol.

I was given a list of some other organic compounds with their enthalpy of vaporization values and asked to measure the time it took to evaporate a drop of each:

Compund Enthalpy of vaporization (kJ/mol)  time in seconds

Water               43.98                            155
Methanol           37.43                             5
Ethanol             42.43                             27
1-propanol         47.45                             25
1-butanol           52.35                            41
1-pentanol         57.02                            42
Heptane            36.57                            15
Octane              41.47                            22
Nonane             46.55                            59
Decane              51.42                           65


The time it took for gasoline to evaporate = 8 seconds
and 2-propanol = 22 seconds

I am now supposed to calculate the enthalpy of vaporization of gasoline and 2-propanol by comparing the times to the given compounds.

Now I was wondering if you guys can give me some tips on how to do this. What should i consider when trying to calculate the enthalpy of vaporization? It is strange that water has such a lower enthalpy of vaporization value than for example 1-propanol but it still took a lot more time to vaporize a drop of water than a drop of 1-propanol. Also, what compounds does gasoline consist of?

I would appreciate any help i can get

Thanks.

[Donaldson Tan]

Compare your test substance to structurally similar substances.

Compare the time taken for 2-propanol to evaporate to Methanol, Ethano, 1-propanol, 1-butanol   and entanol.

Compare the time taken for gasoline to evaporate to Heptane, octane, Nonane and Decane.