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Physical Chemistry
In a photochemical decomposition of acetone using 313 nm light, 7.57 10
6
mol of
carbon monoxide is formed in 20 minutes. If the light absorbed corresponds to
2.41 10
3
J s
1, calculate the quantum efficiency for the formation for carbon monoxide
6
mol of
carbon monoxide is formed in 20 minutes. If the light absorbed corresponds to
2.41 10
3
J s
1, calculate the quantum efficiency for the formation for carbon monoxide
Physical Chemistry
A 1-dimensional particle in a box is subject to the time-independent pertubation: H1 = sin[(2*pi*x)/2]
a. is there a change in the ground state Energy? (YES/NO, and show why) Hint: you will need to set up an integral and use symmetry arguments
b. is there a change in the first state Energy? (YES/NO, and show why) Hint: same hint!
a. is there a change in the ground state Energy? (YES/NO, and show why) Hint: you will need to set up an integral and use symmetry arguments
b. is there a change in the first state Energy? (YES/NO, and show why) Hint: same hint!
Physical Chemistry
Three 1.0 liter flasks are filled with hydrogen, oxygen and Neon, respectively, at STP. Which of the following statements is true?
Physical Chemistry
Calculate the entropy for the melting of 25g of ice, initially stored at -15 degree celcius, then brought to 25 degree celcius. Consider the specific heat of melting for water to be 79.7 cal g-1, the heat capacity of ice is 0.5 cal g-1, and that of liquid water is 1.0 cal g-1
Physical Chemistry
which of the following can be separated by adding water, stirring and filtering
Physical Chemistry
when 5.15 2-10 kg of an organic compound was dissolved in 3.50 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.
Physical Chemistry
How much of 80% pure CaCO3 will be required to produce 48.8 litres of carbon dioxide at STP
Physical Chemistry
which of these alkanes is expected to have the highest viscosity?
nonane
heptane
octane
decane
nonane
heptane
octane
decane
Physical Chemistry
Calculate the molecular mass of 9.21g non-volatile organic compound, dissolved in 50g of pure water at 25oC, which depresses the vapour pressure of the water from 3.16 x 103 to 3.10 x 103 N m-2.
Physical Chemistry
What is the total volume of the solution, when 3.80 mol of water is mixed with 0.500 mol of ethanol? The partial molar volumes of water and ethanol at this composition are 1.80 x105 m3 mol-1 and 5.34 × 10-5 m3 mol-1, respectively
