Chemistry, 12.08.2019 20:10, jmcartwright00
Not all molecules in a fluid phase or atoms in a crystal, have the same mechanical energy ϵ . there is a distribution of energies in complex systems where the probability distribution is given by the boltzmann distribution law: pi=1qe−ϵi/kbt and where the partition function q=∑i=0me−ϵi/kbt. the thermodynamic internal energy is a measure of the average mechanical energy of a system, i. e. un=< ϵ> =∑i=0mpiϵi. the heat capacity on the other hand measures the energy disperion of the system and is therefore propotional to the variance of the energy: cv=nσ2ϵkbt2 where σ2ϵ=< ϵ2> −< ϵ> 2part a assume at t=298k only the four lowest vibrational energy levels of cl2 are populated. the four energy levels are non-degenerate and are separated by a constant energy spacing of δϵ=1.12×10−20j. calculate vibrational partition function for cl2 . at t=298k. assume the ground state energy ϵ0=0j .part b calculate the average vibrational energy < ϵ> at t=298kpart c calculate the average squared vibrational energy < ϵ2> part d calculate the molar vibrational heat capacity cv for cl2 at t=298k.
Answers: 3
Chemistry, 21.06.2019 18:30, jadepotts3965
Calculate the change in entropy if br2(l) is converted into gaseous br atoms. s° for br2(l) = 152.2 j/(mol•k) s° for br2(g) = 245.5 j/(mol•k) s° for br(g) = 175.0 j/(mol•k)
Answers: 2
Chemistry, 22.06.2019 00:30, BLASIANNkidd
Maria wants to determine which type of disinfectant kills the most bacteria. which of the following is the best way for maria to determine this? a. ask ten different companies that make disinfectants which type is best. b. put the same amount and species of bacteria on ten identical plates, and add ten different kinds of disinfectant to each plate. c. interview ten different people to determine which type of disinfectant they prefer. d. put the same amount and species of bacteria on ten identical plates, and add a different disinfectant to each plate.
Answers: 1
Chemistry, 22.06.2019 05:30, sethjohnson386pbnm3x
Modern weaponry has increased the number of deaths in wars and violent conflicts.
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Chemistry, 22.06.2019 15:00, levelebeasley1
Which theory was contradicted by experiments with the photoelectric effect? light spreads out after it passes through a small opening. as soon as light strikes metal, electrons will be ejected. visible light, regardless of color, will cause the ejection of electrons when striking metal. the kinetic energy of ejected electrons depends on the frequency of light that strikes the metal.
Answers: 2
Not all molecules in a fluid phase or atoms in a crystal, have the same mechanical energy ϵ . there...
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