Why are bigger hydrocarbons more difficult to ignite ?
My guess is , Hydrocarbons have to be in the gaseous state to ignite , and bigger hydrocarbons are less volatile so only the molecules on the surface of the liquid hydrocarbon will react with the oxygen .
Is my guess rational and what is the correct answer ?
AS LEVEL CHEMISTRY please help . I have an answer to my question but I don't know if its correct?
2017-11-28 10:38 pm
回答 (3)
2017-11-28 11:03 pm
Yes. You are correct. Liquids don't burn. Vapours do so the more vapour a flammable liquid is producing the easier it will ignite. In more scientific terms, the higher the vapour pressure the lower will be the flash point.
2017-11-28 10:47 pm
Hydrocarbons have to be in the gaseous state to ignite. Bigger molecules are less volatile and thus the hydrocarbons would start igniting when sufficient energy is absorbed to raise the temperature in order to vaporize the molecules.
2017-11-28 11:20 pm
You got two good anwers when I arrived, so I won't bother to repeat them. I thought you might enjoy this:
https://www.youtube.com/watch?v=98Vkl1YnNFs
Doing this demo with the classroom lights out is very dramatic.
https://www.youtube.com/watch?v=98Vkl1YnNFs
Doing this demo with the classroom lights out is very dramatic.
收錄日期: 2021-04-18 17:59:26
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