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Physical Chemistry
at 25°C oxygen gas collected over water at a total pressure of
one atm, is soluble to the extent of 0.0393 g/l. what would be its
solubility be if its partial pressure over water was 800 mm Hg.
The vapor pressure of water at 25 °C = 23.8 mmHg
one atm, is soluble to the extent of 0.0393 g/l. what would be its
solubility be if its partial pressure over water was 800 mm Hg.
The vapor pressure of water at 25 °C = 23.8 mmHg
Physical Chemistry
A mixture of CO and CO2 is found to have density of 1.7g/lit at 1atm and 273k. The mole fraction of CO is
Physical Chemistry
The equilibrium vapour pressure over a solid at 300K is known to be 20 Torr, and the enthalpy of sublimation is 8.0 kcal mol-1. Determine the equilibrium vapour pressure over the solid at 350K, assuming that deltaH sublimation is a constant
Physical Chemistry
The normal boiling point of ethanol is 352.6K. The enthalpy of formation in the gas phase is -235.10 kJ mol-1 , while at liquid phase is -277.69kJ mol-1 . Given that deltaCp = 0 for the vapourisation process, compute the equilibrium vapour pressure of ethanol at 298K
Physical Chemistry
Which of the following is not diffract x-rays? Solid,liquid,gas,crystal
Physical Chemistry
Surface tension is as a result of ________.
surface area trying to increase
molecules on the surface of the liquid are drawn inwards trying to minimize the surface area.
air absorbed on the surface
surface molecules having lower energy than bulk molecules
surface area trying to increase
molecules on the surface of the liquid are drawn inwards trying to minimize the surface area.
air absorbed on the surface
surface molecules having lower energy than bulk molecules
Physical Chemistry
What are the mechanisms of preventing a supersaturated solution from being precipitation ?(I know that one of the reasons is that the crystalline nucleous is created in solution but it dissloves again and make the solution supersaturated again specially if the particle is small )
Physical Chemistry
NH4HS(s) evaporates in an evacuated container at 298 K as follows:
NH
4
HS(s) NH
3
(g) + H
2
S(g)
What will be the pressure of each gas at equilibrium if Kp
= 1.10 10
9
Pa
2
at 298 K
NH
4
HS(s) NH
3
(g) + H
2
S(g)
What will be the pressure of each gas at equilibrium if Kp
= 1.10 10
9
Pa
2
at 298 K
Physical Chemistry
When 5.15 10
4
kg of an organic compound was dissolved in 3.50 10
2
kg of
chloroform, the boiling point of chloroform was raised by 0.320 K. Calculate the molar mass
of the organic compound. Molar elevation constant for chloroform is 3.90 K kg mol
1
4
kg of an organic compound was dissolved in 3.50 10
2
kg of
chloroform, the boiling point of chloroform was raised by 0.320 K. Calculate the molar mass
of the organic compound. Molar elevation constant for chloroform is 3.90 K kg mol
1
Physical Chemistry
1 dm
3
of a solution of 2.0 M CuSO
4 is electrolysed using platinum electrodes by passing
4.50 A current for 9000 s. Calculate
i) the mass of Cu deposited, and
ii) the amount of Cu
2+
in the solution at the end of electrolysis.
3
of a solution of 2.0 M CuSO
4 is electrolysed using platinum electrodes by passing
4.50 A current for 9000 s. Calculate
i) the mass of Cu deposited, and
ii) the amount of Cu
2+
in the solution at the end of electrolysis.
