2007-02-03 07:09:16 · 4 answers · asked by danity0414 2 in Science & Mathematics ➔ Chemistry
intermolecular forces of attraction such as van der Waal's increase with increasing molecular weight. this increases things like boilling point, which affects the point at which a substance will exist as gas or liquid or solid. pentane has higher intermolecular forces of attraction than butane, propane and all lower homologues, and these forces are simply high enough to mean that the molecules of pentane are held tightly enough together to exist as a liquid substance.
2007-02-03 07:16:40 · answer #1 · answered by AJ N 2 · 1⤊ 0⤋
Pentane Liquid
2016-12-15 07:05:30 · answer #2 · answered by riddle 4 · 0⤊ 0⤋
I presume you mean as compared to Methane or Ethane, Propane & Butane.
Its because of the extra intermolecular bonding that can go on between different molecules along the length of the chain.
Its this effect that makes the alkanes more and more solid up through the numbers from liquids to wax and finally to tar-like solids.
2007-02-03 07:14:54 · answer #3 · answered by Anonymous · 0⤊ 0⤋
Because the molecular weight is high enough and at r.t. is liquid.
Butane is instead a gas
From hexane to Icosane (20 carbon atoms, m.p. 25°C) they are liquid
Then from Henicosane (21C) they start to be solid.
have fun
2007-02-03 07:16:28 · answer #4 · answered by scientific_boy3434 5 · 0⤊ 0⤋