2) First let us find out which of X and Y will have more number of moles.
Number of moles = given mass/molar mass
Given mass is the same in both the cases, but the molar mass is different.
As Y has a lower molar mass, the number of moles of Y is greater.
Now, molality = number of moles/mass of solvent
here, mass of solvent is the same in both the cases, while the number of moles is greater in case of Y;
Hence Y has a greater value of molality.
Elevation in boiling point = Kb x m
Here, Kb is called as Ebullioscopic constant, which is same in both cases.
But Molality is higher in case of Y;
Thus Y will have a higher elevation in boiling point
Hope it helps
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Answers & Comments
2) First let us find out which of X and Y will have more number of moles.
Number of moles = given mass/molar mass
Given mass is the same in both the cases, but the molar mass is different.
As Y has a lower molar mass, the number of moles of Y is greater.
Now, molality = number of moles/mass of solvent
here, mass of solvent is the same in both the cases, while the number of moles is greater in case of Y;
Hence Y has a greater value of molality.
Elevation in boiling point = Kb x m
Here, Kb is called as Ebullioscopic constant, which is same in both cases.
But Molality is higher in case of Y;
Thus Y will have a higher elevation in boiling point
Hope it helps