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Application of chemical equilibrium


A flask is charged with 2.00 atm of nitrogen dioxide and 1.00 atm of dinitrogen tetroxide at 25 oC and allowed to reach equilibrium. When equilibrium is established, the partial pressure of NO2 has decreased by 1.24 atm. (a) What are the partial pressures of NO2 and N204 at equilibrium? (b) Calculate Kp and Kc for following reaction at 25 2 NO2(g) N204(g)


Consider the molecule azulene and a. Setup the secular determinant for azulene within the Hückel approximation and using the out-of-plane C2p orbitals as basis set. b. Estimate π-electron binding energy within the Hückel approximation. c. Approximate the delocalization energy.


what is mass of 5 mole of ammonia?calculate the number of NH3 molecules, nitrogen atoms and hydrogen atoms in it



Calculate the heat of combustion of ethane if heat of formation is

33kJmol'

5. The heat of combustion of benzene, CoHscn and cyclohexane, CsHiżın are-

-3268 and - 3920kJmoirespectively. Calculate:

(a) the heat of hydrogenation of benzene to cyclohexane.

(5) the heat required to hydrogenate a double bond in benzene.


Calculate the lattice energy of calcium chloride from the following

Standard heat of formation of Cacho=-794kImor!

Heat of sublimation of Caly) = +193kīmolt

Dissociation energy of Clz9) = +242kimol

Ionization energy of Cats to Cat=1725ximo!!

Electron affinity of Cle=-36411mot!


Calculate the lattics energy of rubidium fluoride from the following data

Heat of sublimation of Rbo=+36kmol!

Standard heat of formation of Rbra = -54211 mot

Dissociation energy of Fzca = +1551 tot

Ionization energy of Rb3 = + 4021dmor!

Electron affinity of Fia=-346 mol


Calculate ΔH at 400oC for the reaction

SO2(g) + 1/2O2(g)⟶SO3(g)

given that the standard heat formation at 25oC of SO2 and SO3 are -70.9 and -94.4 (in kcal mol-1) repectively and that the heat capacities in JK-1mol-1 are:

SO2: Cp = 10.39 + 2.54 x 10-3T -1.42 x 10-5T2

SO3: Cp = 13.70 + 6.42 x 10-3T -3.12 x 10-5T2

O2: Cp = 7.16 + 1.00 x 10-3T -0.40 x 10-5T2

how many phases and components are present in a heated vessel containing blue copper sulphate crystal


Why molecular oribital theory changes in oxygen case