water evaporates when it is heated. does it goes the same to oil as well?
2007-01-06 19:29:59 · 13 answers · asked by sarra_hilfiger 2 in Science & Mathematics ➔ Chemistry
I think there is misconception here. There is diff. between evaporation tion & boiling. Water boils when heated. You might be thinking of boiling of oil here. Evaporation is a natural process which depends on density & boiling point & surrounding pressure. Water evaporates without boiling depending on surrounding pressuren & temperature. When you are at sea shore the process of evaporation is much slower than when you are at the hill or mountain top (pressure variations). Now for cooking oil (say Olive Oil), It has much higher boiling point than water (500+ deg F Vs 212 deg F at ntp) , Oil can boil when it reaches its boiling point. It can generate smoke as well when it reaches the Smoke point. For example, Oilve oil got Boiling point of 570 deg & a Smoking point of 410 Fdeg . However, some Peroleum oil can evapoate at nomall temp & presuure such as Octane, Petrol, ..etc having vey low density.
SO, WHEN YOU HEAT THE OIL IT CAN BOIL not EVAPORATE WHEN IT REACHES THE BOILING POINT.
2007-01-06 20:32:36 · answer #1 · answered by ckd_xl 2 · 0⤊ 0⤋
Yes, heating oil does evaporate but, in a closed tank, where is it going to evaporate to ?. It will simply exert a vapour pressure in equilibrium with the temperature. It depends on the temperature 2 months earlier. If it was COLDER then than when you last checked to find the 8mm loss, the higher temperature now will put more into the vapour phase showing a lower liquid level. A higher tank pressure will also be seen. (Do you have a Pilot flame using any oil ?). Otherwise, as stated by another answerer, there's a very small leak which could be from a valve stem or a pump shaft seal which are the main culprits in those situations.
2016-05-23 02:19:44 · answer #2 · answered by Anonymous · 0⤊ 0⤋
I think, oil has a viscocity rating, which is to say how much heat it will tolerate. Motor oil, for example, is heated all the time and does not break-down at the same point as cooking oil, which does not evaporate readily. Over time, yeah it does but will not evaporate before your eyes from being heated like water. I guess, as it loses the chemicals added to give it the resistance to heat it begins to break -down and evaporate, which can lead to mechanical failure, in the case of the car.
2007-01-06 19:37:28 · answer #3 · answered by Anonymous · 0⤊ 0⤋
Generally yes but the vapor pressure of oil is very low so it may not be noticable. You would have to look at the specific oil to know at what the vapor pressures are for various temperatures. You might find the oil chemically decomposes at a lower temperature than where the vapor pressure becomes significant.
One situation where this is important is in ultra high vacuum systems. Special oils are used in the pumps because the wrong oil would simple evaporate into the system preventing the pump from reducing the pressure to the desired level.
2007-01-06 19:37:45 · answer #4 · answered by Anonymous · 0⤊ 0⤋
Of course!!! However it has higher boiling point than water, which means to say that it will evaporate at a certain temperature that is higher than 100*C(boiling point of water).
Remember : Different oil has different boing point!!!
Check the boiling point(smoke point) of different oil in the website. This shows at that temperature the oil will evaporate.
2007-01-06 19:36:01 · answer #5 · answered by Ong 2 · 0⤊ 0⤋
YES. Oil does evaporate. But it evaporates in a weird way. Oil is not a pure compound. Oil
is a blend of many different sizes of what chemists call 'hydrocarbons' or 'molecules'. These
molecules range from very very small (16 grams / mole ) to very very large molecules
(100s-1,000s of grams / mole)
2007-01-06 19:41:01 · answer #6 · answered by Anonymous · 0⤊ 0⤋
In the superstore, fruits are usually picked out far too soon. Some are rocks, many are bitter. Some of the fruit and vegetables are right (zucchini, onions, garlic, lettuce, greens, and a few others) so I'd have to go with vegetables.
2017-02-18 23:07:49 · answer #7 · answered by Steven 4 · 0⤊ 0⤋
It can be burned off but not evaporate like you're thinking.
2007-01-06 19:32:41 · answer #8 · answered by Laughing Man Copycat 5 · 0⤊ 0⤋
Any liquid can evaporite if it heated till its point of vaporization. Each liquid has its own. For oil it ranges from 125 to 155°C.
2007-01-06 19:37:49 · answer #9 · answered by Mr.Scientist 3 · 1⤊ 0⤋
i think it does (i'm not that sure because when i cook the do vanish) maybe it do evaporates but not as fast as water does when heated.
2007-01-06 19:33:59 · answer #10 · answered by paola 1 · 0⤊ 0⤋