Suppose a particularsample lost weight upon standing for a week. How might you e

Question

Suppose a particularsample lost weight upon standing for a week. How might you explainthat? Suppose thesample gained weight upon standing for a week. How might youexplain that? If your sample gainedweight, what would you expect might happen to its meltingpoint? Suppose a particularsample lost weight upon standing for a week. How might you explainthat? Suppose thesample gained weight upon standing for a week. How might youexplain that? If your sample gainedweight, what would you expect might happen to its meltingpoint?

Explanation / Answer

Suppose a particular sample lost weight upon standing for a week.How might you explain that? It is either volatile or of sublimability at ambienttemperature.
Suppose the sample gained weight upon standing for a week. Howmight you explain that? the sample is hygroscopic. with time being, more and more water isabsorbed into the sample.
If your sample gained weight, what would you expect might happen toits melting point? Its melting point will be lower. This is very common for thehygroscopic materials. After absorbing water, the material is notpure anymore. it's a mixture consist of the material andwater.

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