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In fractional distillation, the substances in a mixture are heated to their boiling points. Different substances have different boiling points, so will be separated at different times. The answer to your question is simply because they have different boiling points.
Increasing pressure hinders the ability of two fluids with different boiling points to separate. Reducing pressure does the opposite and makes the fluids easier to separate based on boiling point.
The separation of liquids is based on the difference of boiling points.
The boiling point of water is fixed but boiling points depends on the atmospheric pressure.
The process of distillation is based on the differences between boiling points of substances.
Boiling point is where the vapor pressure of a liquid equals the ambient pressure. The closer you are to the boiling point, the more driving force there is for the liquid to evaporate until it saturates the surrounding air.
It is important because boiling points are dependent onthe pressure.
In fractional distillation, the substances in a mixture are heated to their boiling points. Different substances have different boiling points, so will be separated at different times. The answer to your question is simply because they have different boiling points.
To separate substances (that have different boiling points).
There is no single boiling point. A variety of substances can form hydrogen bonds, all with different boiling points.
If they petrol you're referring to includes things such as the butane in lighters and the propane used in some grills, the gas is liquefied under pressure. As pressure increases, so do the boiling points of most substances. Under normal pressure, propane and butane have boiling points below room temperature and are therefore normally gasses. At higher pressure the boiling points are above room temperature and so they are liquids.
different substances have different boiling points, a main reference to boiling points is the boiling point of water (H2O) which is 100 degrees Celsius
Increasing pressure hinders the ability of two fluids with different boiling points to separate. Reducing pressure does the opposite and makes the fluids easier to separate based on boiling point.
Distillation is based on the differences of boiling points of substances.
The separation of liquids is based on the difference of boiling points.
At 1atm, the melting point of H2O(water) is 0 degrees celcius and the boiling point is 100 degrees celcius. Carbon dioxide's boiling point is at -25 degrees and so its meting point. Since it crystallises and sublimates, it has no liquid form. The boiling- and melting points of elements/compounds depend on the amount of pressure exerted on the element/compound. Generally, the higher the pressure, the higher the boiling and melting points. All except for water, gallium and bismuth. These substances' melting point decreases as pressure increases.
The boiling point of water is fixed but boiling points depends on the atmospheric pressure.