the solubility of solid solutes with negative heats of solution is increased wit
ID: 531736 • Letter: T
Question
the solubility of solid solutes with negative heats of solution is increased with an
a) increase in temperature
b) decrease in temperature
c) increase of pressure
d) decrease in pressure
e) none if the above
the vapor pressure of a solvent _______ with an increase in the concentration of a non-volatile solutes.
a) increases
b) decrease
c) remains the same
d) none of the above
which of the following statements is false?
a) the rate of vaporization increases with increasing temperature
b?) the rate of vaporization increases with decreasing strength of intermolecular forces
c) molecules with hydrogen bonding are more volatile than compounds with dipole dipole forces
d) the rate of vaporization increases with increasing surface area
e) none of the above
Explanation / Answer
(1)
(b) Decrease in temperature
Becuase exothermic reactions at equilibrium are favored by decrease in temperature.
(2)
(b) Decreases
Because Increase in conc. of non volatile solute replances more number of solvent molecules at the surface, hence decreases the vapour pressure
(3)
(c) molecules with hydrogen bonding are more volatile than compounds with dipole dipole forces
Because H - bond is stronger than diole - diole attractions.
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