Podcast
Questions and Answers
It is difficult, though, to find a melting ________
It is difficult, though, to find a melting ________
point
During the melting process, all of the energy added to a substance is consumed as heat of ________
During the melting process, all of the energy added to a substance is consumed as heat of ________
fusion
Impurities tend to depress and broaden the melting range, so the purified sample should have a higher and smaller melting ________ than the original, impure sample
Impurities tend to depress and broaden the melting range, so the purified sample should have a higher and smaller melting ________ than the original, impure sample
range
The melting point of a substance is a physical property often used to identify compounds or to check the purity of the ________
The melting point of a substance is a physical property often used to identify compounds or to check the purity of the ________
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Determining the melting point of a compound is one way to test if the substance is ________
Determining the melting point of a compound is one way to test if the substance is ________
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The melting point of a substance is a measure of the amount of kinetic energy (heat) that must be supplied to the particles of the substance in order to overcome the ________ forces that confine them to the solid state
The melting point of a substance is a measure of the amount of kinetic energy (heat) that must be supplied to the particles of the substance in order to overcome the ________ forces that confine them to the solid state
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A dilute solution of a liquid begins to freeze at a temperature somewhat lower than the ______ point of the pure liquid.
A dilute solution of a liquid begins to freeze at a temperature somewhat lower than the ______ point of the pure liquid.
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As the pure solvent crystallizes from solution, the concentration of the impurity must increase and the ______ point of the solution must fall.
As the pure solvent crystallizes from solution, the concentration of the impurity must increase and the ______ point of the solution must fall.
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A sharp melting point is often taken as evidence that the sample is fairly ______.
A sharp melting point is often taken as evidence that the sample is fairly ______.
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An identical or near identical temperature range of melting is not, in itself, proof of the ______ of two organic chemical samples.
An identical or near identical temperature range of melting is not, in itself, proof of the ______ of two organic chemical samples.
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If each individual sample melts 'sharply' and at the same temperature, and if an intimate mixture of the two, made by rubbing approximately equal amounts together, melts over a wide ______, the two substances are not the same.
If each individual sample melts 'sharply' and at the same temperature, and if an intimate mixture of the two, made by rubbing approximately equal amounts together, melts over a wide ______, the two substances are not the same.
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Usually, however, you wish to establish the ______ rather than the nonidentity of two samples.
Usually, however, you wish to establish the ______ rather than the nonidentity of two samples.
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