2007-03-02 19:15:28 · 3 answers · asked by hiscageofstars 1 in Science & Mathematics ➔ Chemistry
Br2 is a liquid at room temp (whereas Cl2 is a gas)--higher MP--and has a higher BP than Cl2 for the same reason: it's a heavier molecule.
2007-03-02 19:40:15 · answer #1 · answered by Some Body 4 · 0⤊ 0⤋
Bromine liquid and chlorine gas are both non-polar molecules. Therefore, they are held together by the same type of secondary interactions, that is dispersion forces(some call it London forces). Bromine has a bigger molecular mass and this causes bromine molecules to form extensive dispersion forces among them. So more heat energy is required to break the exensive dispersion forces in bromine than chlorine during boiling.
2007-03-06 09:27:34 · answer #2 · answered by JustMe 2 · 0⤊ 0⤋
Some Body's answer is only half the story. Otherwise why is water (H2O, Mr=18) a liquid at rtp, whereas H2S (Mr=34) a gas under the same conditions.
Consider also the interactions between the molecules, things like London forces and similar.
2007-03-03 05:37:49 · answer #3 · answered by Stephan B 5 · 0⤊ 0⤋