Boiling point

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melissa_dis4K
Posts: 106
Joined: Fri Sep 28, 2018 12:28 am

Boiling point

Postby melissa_dis4K » Fri Dec 07, 2018 10:38 pm

How can you determine which has a higher boiling point and why between C5H12 and C3H8? Thank you!

timothy_ho_4B
Posts: 61
Joined: Fri Sep 28, 2018 12:29 am

Re: Boiling point

Postby timothy_ho_4B » Fri Dec 07, 2018 11:50 pm

C5H12 has a higher boiling point because as the molecule increases in size, there is more surface area for Van Der Waals forces to attract the molecule, and thus making the IMF of C5H12 molecule stronger and the boiling point higher.

Chloe Likwong 2K
Posts: 70
Joined: Fri Sep 28, 2018 12:23 am

Re: Boiling point

Postby Chloe Likwong 2K » Sat Dec 08, 2018 12:07 am

Adding to the previous comment, there are more bonds present, thus, there are more bonds to break.

Claudia Luong 4K
Posts: 59
Joined: Fri Sep 28, 2018 12:25 am

Re: Boiling point

Postby Claudia Luong 4K » Sat Dec 08, 2018 7:47 am

Larger and heavier molecules have stronger London dispersion forces. C5H12 is a bigger molecule, therefore C5H12 has stronger LDFs and you will need a higher temperature to break apart these attractive forces so C5H12 has a higher boiling point.


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