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, 22.06.2019 12:00
Give the set of reactants (including an alkyl halide and a nucleophile) that could be used to synthesize the following ether: draw the molecules on the canvas by choosing buttons from the tools (for bonds and charges), atoms, and templates toolbars, including charges where needed. ch3ch2och2ch2chch3 | ch3
Answers: 1
Chemistry, 22.06.2019 17:20
The small bags of silica gel you often see in a new shoe box are placed there to control humidity. despite its name, silica gel is a solid. it is a chemically inert, highly porous, amorphous form of sio2. because water vapor readily adsorbs onto the surface of silica gel, it acts as a desiccant. despite not knowing mechanistic details of the adsorption of water onto silica gel, from the information provided you should be able to make an educated guess about the thermodynamic characteristics of the process. predict the signs for δg, δh, and δs for the adsorption of water.
Answers: 2
Chemistry, 23.06.2019 09:50
T(s) in2os] (m) 0 185 2.39 546 1.90 725 1.70 the decomposition of n205 can be described by the equation 2.68 given these data for the reaction at 45°c in carbon tetrachloride solution, calculate the average rate of reaction for each successive time interval. ntr s to 185 s 185 s to 546 s 546 s to 725 s number number number reaction rate: m/s m/s m/s
Answers: 1
Not all molecules in a fluid phase or atoms in a crystal, have the same mechanical energy ϵ . there...
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