Chemistry Assignment Example | Topics and Well Written Essays - 250 words

Chemistry - Assignment Example hesitancy 1En=-(13.6eV*z)/n, be take a shit z=4it can be written as En=-16*13.6eV / nii) the dependence of quatum numbers n upon l is given by the following formulal=n-12(2*l+1)=2* niii) n=2 for beryllium, so l=1 and can not be 3d) iii) energy emitted by photon Einf- E2= 0+54.4eV=54.4 eV= 54.4*1.6*10-19 J=8,7*10-18 J8,7*10-18 Jnow we should express photons frequency from it energyE=h*f = f=E/hf= 8,7*10-18 J/6.63*10-34 J*s=1.31*1016 1/s1.31*1016 Hz is ultraviolet spectrumiv) the energy of the lowest energy photon which can be diped by beryllium ion isE2-E1=-54.4eV+217.6=163.2 eVv) it could absorb a photon of a lower energy if its electron was on a higher energetic leveli) E1=-16*13.6eV / 1=-217.6eV E2=-16*13.6eV / 4= -54.4eV E3=-16*13.6eV / 9 = -3.067eV Eoo=-16*13.6eV/inf = 0Question 3- because H0 (=29kJ) reaction is endothermic- I2+Cl2 =2ICL (-29kJ)H=2HICL-HCl2-HI2- equilibrium will not change as the number of molecules in the left part of the equival ence equals to the number of molecules in the right part of the equation I2+Cl2 =2ICL 1+ 1=2 - because its endothermic reaction the increase of temperature will cause the discharge of equilibrium to the right (forming of ICl)- the reaction will pass faster with the following rate lg (k(T2/T1)) where k is the reaction rate coefficient- the presence of catalyst will cause the reaction rate to increase, the equilibrium will cause the shift to the right (forming of ICl) as catalyst mainly reduces activation energy.