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The carbon skeleton of pentane contains 5 carbon atoms, the carbon skeleton of heptane contains 7 carbon atoms. The main reason for increased boiling point are London dispersion forces, these increase the with the number of electrons- so as heptane has more electrons its dispersion forces are greater and the boiling point is higher. Another contributory factor is the mass as the molecule of heptane is heavier and this means it takes more energy to get it to vaporise.
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∙ 11y ago
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∙ 8y agoHexane has a higher boiling point than pentane because its hydrocarbon chain is longer. This creates more favorable hydrophobic interactions between the molecules. So, more energy is required to break these intermolecular interactions.
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∙ 8y agoBoth octane and pentane are non-polar hydrocarbons, and as such, the only intermolecular force between their molecules is London dispersion force. Octane has considerably more total electrons than pentane does, so its level of dispersion force (caused by the random motion of electrons causing brief dipole moments across the length of the molecule) will be greater than pentane's. This gives octane a higher boiling point, because it takes more energy to overcome those dispersion forces in octane than pentane.
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∙ 6y agoIn 3-pentanol, you have hydrogen bonding holding the molecules together but in 3-chloropentane, there is no such hydrogen bonding. It is easier to break the intermolecular bonds in 3-chloropentane, and so it has a lower boiling point.
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∙ 16y agodue to presence of hydrogen bonding in petanol which makes it more stable & to have higher melting point
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∙ 13y agoIt is a larger, more massive molecule with more London dispersion intermolecular bonds.
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∙ 10y agoWiki User
∙ 11y agoOctane has more carbon atoms than pentane.
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Why does heptane have a higher boiling point than methanol?
Heptane has 7 carbon atoms. So it has a greater surface area than methanol. Therefor heptane has a higher boiling point.In general, all else being equal the higher the molecular weight, the higher the boiling point. The molecular weight of methanol is 32, the molecular weight of heptane is 100. So, ignoring everything but that, you'd expect heptane to have a higher boiling point than methanol.A better question might be "why is the boiling point of methanol so much higher than that of ethane, which has a similar molecular weight (30)?" The answer to that is hydrogen bonding.
Does chlorine have a higher boiling point than iodine?
iodine is having higher boiling point
Will LiCl have a higher boiling point than water?
boiling point:1382 C Melting point: 605 C
Ethanol c2h5oh and methyl ether ch3och3 have the same molar mass.W hich has a higher boiling point?
ethanol has a higher boiling point- of 78°C :)
What is the boiling point of treacle?
alot higher that water
What C7H16 isomer has the highest boiling point?
Heptane - longer the chain, higher the boiling point. Least amount of branches, higher the boiling point.
Octane has a higher boiling point than pentane because?
Octane has a higher boiling point than pentane because octane has a larger number of carbon atoms than propane
Why does heptane have a higher boiling point than methanol?
Heptane has 7 carbon atoms. So it has a greater surface area than methanol. Therefor heptane has a higher boiling point.In general, all else being equal the higher the molecular weight, the higher the boiling point. The molecular weight of methanol is 32, the molecular weight of heptane is 100. So, ignoring everything but that, you'd expect heptane to have a higher boiling point than methanol.A better question might be "why is the boiling point of methanol so much higher than that of ethane, which has a similar molecular weight (30)?" The answer to that is hydrogen bonding.
Is pentane a liquid at 40 degrees?
Yes, unless you mean 40oC. That is because the boiling point of pentane is 36.1oC (97oF). So above the boiling point temperature pentane would exist as a gas.
Why n-pentane has higher melting point than neopentane?
It is because n-pentane is a straight chain hydrocarbon meaning it has more surface area to reach the boiling point, neopentane has significantly less surface area that's why it will boil quicker than n-pentane. The more branched molecule, the lower is its boiling point will be & the less branched molecule, the higher its boiling point will be. For combustion energy the opposite holds true, the more branched molecule has a higher energy than an unbranched one.Hope You Like My Answer...By rananeeraj168@gmail.com in facebook
How is a mixture o heptane boiling point 98C and heptanol boiling point 176C?
well well well i was asking for the answer..??
Which has the highest boiling point hexane or pentane?
Octane. The boiling point of straight-chain alkanes increases within its homologous series (meaning methane has a lower boiling point than ethane, which is lower than propane, etc). Hexane : Boiling Point 69 o C Octane : Boiling Point 125.5 o C
Which of the alkanes are liquids at room temperature?
Ethene, propene and butene. Ethene's boiling point is -104 Propene's " " " -48 But-1-ene " " " -6 Pentene being the alkene with the lowest number of carbons which is a liquid at room temperature (boiling point 30) So hot countries may count this as a gas!! Found on wiki, do some research and dont be lazy!!
How would you separate a mixture of heptane and heptanol at boiling point?
Since Heptane has a boiling point of 98 degrees Celsius, and Heptanol has a boiling point of 176 degrees Celsius, you'd evaporate or boil the Heptane and Heptanol mixture to around 120 degrees Celsius. Which would leave the Heptanol behind and have the Heptane evaporated.
Which has the highest boiling point out of pentane neopentane and isopentane?
somewhere around 56 degrees C
Does chlorine or oxygen has higher boiling point?
Chlorine has higher boiling point.
How does pressure affect boiling point?
The boiling point is that temperature when the SATURATEDvapor pressure of a liquidbecomes equal tothe surrounding pressure.Thus the higher the sorrounding pressure, the higher the boiling point.
