Register to reply

Density and Boiling Point?

by SuperSandwich
Tags: boiling, density, point
Share this thread:
SuperSandwich
#1
Apr20-14, 07:02 PM
P: 2
Just a random question. Is there a specific relationship between density and boiling point? If there is, what is it and why do they relate?
Phys.Org News Partner Physics news on Phys.org
Mapping the optimal route between two quantum states
Spin-based electronics: New material successfully tested
Verifying the future of quantum computing
paisiello2
#2
Apr22-14, 01:53 PM
P: 558
In general I don't think there is. I believe that molecules that have similar type of chemical bonds (e.g. covalent bonds) in general will have higher boiling points as the density of the pure substance increases.
dauto
#3
Apr22-14, 05:29 PM
Thanks
P: 1,948
There are two things that play a major role in the boiling point of substances

1: how heavy are the molecules.
2: how strong are the attractive forces between molecules.

mathman
#4
Apr22-14, 06:45 PM
Sci Advisor
P: 6,039
Density and Boiling Point?

One additional factor is outside (atmospheric) pressure.

From Wikipedia, the free encyclopedia


Boiling water
The boiling point of a substance is the temperature at which the vapor pressure of the liquid equals the pressure surrounding the liquid[1][2] and the liquid changes into a vapor.

A liquid in a vacuum has a lower boiling point than when that liquid is at atmospheric pressure. A liquid at high-pressure has a higher boiling point than when that liquid is at atmospheric pressure. In other words, the boiling point of a liquid varies depending upon the surrounding environmental pressure. For a given pressure, different liquids boil at different temperatures.


Register to reply

Related Discussions
Calculate freezing point depression and boiling point elevation Biology, Chemistry & Other Homework 2
Boiling Point before Melting Point? Chemistry 13
Impurities on melting point and boiling point of water Chemistry 9
Boiling point/freezing point Biology, Chemistry & Other Homework 1
Which has highest density/boiling point: neon 20 or 22. Please help Biology, Chemistry & Other Homework 2