Urea forms an ideal solution in water. determine the vapour pressure of an aqueous solution contain 10% by mass of urea at 40°c
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Answer:
23.14mm
Explanation:
Mass of urea = 5 g
Mass of water = (100-5) = 95 g
No. of moles of urea =
60
5
=0.083
No. of moles of water =
18
95
=5.278
Total number of moles =5.278+0.083
=5.361
Mole fraction of solvent =
5.361
5.278
P
s
= Mole fraction of solvent ×P
0
=
5.361
5.278
×23.5=23.14mm
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