Question

Contributions to the entropy of vaporization for ethanol and methanol @abb0t

Answer 1

Hey @abb0t I wanted to ask if you had an opinion to the following I'm working with:
I've been determining the entropy and enthalpy of vaporization for both ethanol and methanol along with the atmospheric boiling point.

When I calculate the relative percentage variation for all the thermodynamic parameters I get a percentage lower than 0.6 for all the data, except the entropy of vaporization for ethanol.

When I calculate the relative percentage variation for the entropy of vaporization I get about 2.14 %. I know this is a small number, yet it makes me wonder if the table value might be inaccurate, since all the numbers have been derived from each other.

Answer 2

Um, what is your question here.

Answer 3

Do you think it is weird I get a quite higher relative percentage variation for that single parameter, when all the other parameters have a relative low relative percentage variation when comparing?

Answer 4

You got way more experimental experience than I, therefor I ask you.

Answer 5

So far what I can see from theory is that
\[\Large \Delta _{vap}S(ethanol)>\Delta _{vap}S(methanol)\]

@Kainui What do you think? :)

Answer 6

I mean, this seems reasonable but very vague. I could help you out more if you had some concrete numbers showing how you got to these values.