chem entropy

This forum made possible through the generous support of SDN members, donors, and sponsors. Thank you.
I guess C3H8. The smaller the carbon chain, the lower the boiling point also the higher entropy? am i making any sense now? i just confused myself more lol
 
Hi Pistolpete007. I believe that C10H20 has the highest entropy. Entropy is a measure of the disorder of the system. Since C10H20 contains the highest amount of molecules, then it would give off more disorder. Imagine a candy bag full of 10 candies, and one with 100, well it would take longer to cleanup the one with 100 candies because it creates a bigger mess. I am basing my answer on the number of atoms present since the compounds you gave do not have states (solid, liquid, gas, aq).

And yes, dleodyddlek, you are right that the smaller the molecule, less dispersion forces, and the lower the boiling point. But please note that this does not correlate with entropy, as entropy is again a measure of the amount of disorder pertaining to a system.

Have a good one.
 
see thats the way i thought it was....bc thats what it said on destroyer that c4 was larger than c3 so it has more entropy....howeverrr

on aciver test 1....it is known that c1-c4 is gas while c4-16 is liquid and nehting above that is solid

so C10 would be a liquid right? so wouldnt it make it have less entropy than a C4 which is a gas?

this is a question i just made up i thought if the dat wanted to be tricky they could ask something like this...what do u think?
 
Hi. I know exactly what you mean, and I was afraid that there might be some underlying concept/trick in the question, lol. That is why I mentioned that your compounds do not give "states", so I was being careful and just basing my answers on the number of atoms.

However, your question is coming from Achiever and the question regarding entropy and the one from achiever have different conditions. Achiever asks:

Which of the following unbranched alkanes are liquids at room temperature, 25oC, and atmospheric pressure, 1atm?

Since we have limitations put, the underlying concept now becomes based on the states of the compounds. So I would say that the smaller molecule with C4 would have a higher entropy because it would exist as a gas.

If anybody has other reasoning, I would surely appreciate it.
 
Top