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Answered 2012-05-31 08:18:33

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.

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Many substances have different melting and boiling points, thus one can use their melting and boiling points to identify them.


Melting points can be helpful in distinguishing different substances. Pure substances usually have a unique fixed melting point. Same goes for the boiling points.


Because different substances have different density and chemical make up.


Generally ionic substances have high melting and boiling points.


The boiling and melting points of pure substances vary based on the substance. Gasses for example have lower boiling and melting points than metals.


Impurities can increase or decrease the melting and boiling points of substances depending on what the impurity is.


Because they are unique to each pure substance. Different substances usually have different melting points, so determining the melting point of a substance can narrow down the possibilities for the identity of the substance. Likewise different substances usually differ in their boiling points, so boiling point can narrow down the possible identities of a substance. Although two substances can have nearly identical melting points or have nearly identical boiling points, it is extremely rare for two different pure substances to have BOTH the same melting point AND the same boiling point, so taking the two together is usually enough to uniquely identify a substance, or at the very least narrow it down to a very small list.


Melting and boiling points are different for each compound or element.


The boiling and melting points are very different.


Boiling and melting points are very different.


the conclusion is that the melting points and boiling points of various substances or chemicals are different. Some have m.p. but some don't have while some have b.p. but some don't have.it varies from chemical to chemical.


Different substances usually have different melting points, so determining the melting point of a substance can narrow down the possibilities for the identity of the substance. Likewise different substances usually differ in their boiling points, so boiling point can narrow down the possible identities of a substance. Although two substances can have nearly identical melting points or have nearly identical boiling points, it is extremely rare for two different pure substances to have BOTH the same melting point AND the same boiling point, so taking the two together is usually enough to uniquely identify a substance, or at the very least narrow it down to a very small list. Also, surprisingly, if you mix two substances with the same melting point, the mixture will NOT melt at the expected temperature, so when you have a shortlist based on melting point you take your unknown and mix it with one of the suspects. If it melts at the right temperature, you have identified it. If not, you try the next one.


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.


Different substances do have different boiling points. Pure water is at 212 degrees Fahrenheit (100C) Salted water has a higher boiling point. Chemicals are separated by boiling points. That's how kerosene and gasoline are separated.


Melting point & boiling point means the temp that things melt & boil. Water's freezing & melting point is 32 degrees Fahrenheit or 0 degrees Celsius. The boiling point of water is 100 degrees Celsius or 212 degrees Fahrenheit. Different liquids or substances have different melting, freezing, and boiling points.


The melting point of a substance is the temperature at which the solid phase melts to become a liquid (or the liquid phase of the substance freezes to become a solid). The boiling point of a substance is the temperature at which the liquid phase of the substance boils to becomes a gas (or the gas phase of the substance condenses to become a liquid). These points are different for different substances.


Yes they are very different. It depends on the element that you are finding the melting and freezing point for.


ALL substances (rather: pure compounds) have different boiling points, so name any couple ... !


To separate substances (that have different boiling points).


A boiling point is the temperature at which a liquid becomes a gas in it's surrounding liquids. Just as different materials have different melting points they also have different vaporising points. This is due to the bonding between the molecules. The stronger they are the hotter you must make the liquid to cause it to boil.


M.P=min TEMP From where a solid begins to melt. B.P=MIN TEMP FROM WHERE( MELTED SOLID) OR LIQUID BEGINS to boil.



different substances have different boiling points, a main reference to boiling points is the boiling point of water (H2O) which is 100 degrees Celsius


Distillation separates substances on the basis of the boiling points of the substances.


Different substances have different boiling points.



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