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possibly if it has been contaminated by other substances (as compared to original boiling point - it seems as though it has 2 different boiling points)
things such as sodium chloride (table salt) raise the boiling point of water and lower its melting point
note though that a pure liquid can never have 2 different boiling points - the boiling point is a property of a a liquid and will never change no matter what.
alternatively if the fluid concerned is a mix of 2 different liquids (eg. alcohol mixed in water) the liquid with the lower boiling point (eg. alcohol) will boil off first, then the remaining fluid will continue heating up until the 2nd boiling point is reached (eg. of water). thus the fluid seems to boil at 2 different temperatures
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Which method would be most useful in separating two substances with very different boiling points?
distillation
When would you use filtration to separate a mixture?
Distillation is use when you want to separate a mixture of liquids, the liquid can be heated to force components, which have different boiling points, into the gas phase. The gas is then condensed back into liquid form and collected. Repeating the process on the collected liquid to improve the purity of the product is called double distillation. Although the term is most commonly applied to liquids, the reverse process can be used to separate gases by liquefying components using changes in temperature and/or pressure
What it the scientific definition normal boiling point?
The Boiling Point is the point at which a substance at liquid state boils. The temperature that the liquid has to reach to be at Boiling Point (B.P) ranges, it is different for each liquid. The B.P for water is 100 degrees Celsius.
What would be the best way to separate solutions with different boiling points?
Analytically GLC is the best (Gas chromatography)In a productive way distillation is prominent.
What is a change of state from liquid to gas which is not evaporation and has 4 letters?
If a liquid was to boil to change state, it would be changing from a liquid to a gas, and would be said to be boiling.
What types of mixture do fractional distillation separate?
for mixtures that are miscible but have different boiling points
What is the technique used to separate ethanol from a mixture of ethanol and propanol?
Distillation would work. Those two liquids have different boiling points, and heating it up to the boiling point of the lowest liquid would cause it to boil away, leaving behind the other.
How can iodine have a melting point?
All substances have melting points and boiling points. A melting point is merely the temperarture at which it changes from a solid to liquid and vice versa. The boiling point of a substance would be the temperature at which it changes from liquid to gas and vice versa.
What is the temperature when the gas turns into a liquid?
This would be known as its boiling point because it is at the same point as when a liquid turns into a gas. Each substance has a different boiling point, for example, water's boiling point is 100oc.
What compounds would have the highest boiling points?
ionic
Why methane and silicon dioxide have different boiling points?
They're very different compounds in nearly every way; it would be considerably more surprising if they had similarboiling points.
Which method would be most useful in separating two substances with very different boiling points?
distillation
If you have two substances that are the same size and have similar densities how ever they have different boiling points how would you separate them?
Simply heat the mixture. Given that they have different boiling points, one will evaporate before the other and thus you will have two separate substances
Distillation can be used to seperate solutions of miscible liquids because?
For basic idea, different liquid had different boiling point thus upon boiling the vapour would contain more of the lower boiling point and separated out.
Can you change the boiling point of a liquid?
- You can change the boiling point of a liquid if you add different solutions or chemicals that alter its physical and chemical properties. - Also it can depend on pressure. If, for instance, you were on a mountain the pressure would be higher so the boiling point would be lower.
How can you use boiling points and melting points to determine a solid liquid or gas that an element would be in at a certain temperature?
If the temperature is below the melting point then the element is a solid.If the temperature is above the melting point but below the boiling point, then the element is a liquid.If the temperature is above the boiling point, then the element is a gas.
Which liquid would be the first to be collected in the fractional distillation?
fractional distillation this is a liquid with the lowest boiling point
