Consider an ionic compound, mxmx , composed of generic metal mm and generic, gaseous halogen xx . the enthalpy of formation of mxmx is δh∘f=−421δhf∘=−421 kj/mol. the enthalpy of sublimation of mm is δhsub=155δhsub=155 kj/mol. the ionization energy of mm is ie=401ie=401 kj/mol. the electron affinity of xx is δhea=−321δhea=−321 kj/mol. (refer to the hint). the bond energy of x2x2 is be=239be=239 kj/mol. determine the lattice energy of mxmx .

An charge with mass m and charge q is emitted from the origin, (x,y)=(0,0). a large, flat screen is located at x=l. there is a target on the screen at y position y(h), where y(h) > 0. in this problem, you will examine two different ways that the charge might hit the target. ignore gravity in this problem. 1.assume that the charge is emitted with velocity v(0) in the positive x direction. between the origin and the screen, the charge travels through a constant electric field pointing in the positive y direction. what should the magnitude e of the electric field be if the charge is to hit the target on the screen? express your answer in terms of m, q, y(h), v(0), and l. 2.now assume that the charge is emitted with velocity v(0) in the positive y direction. between the origin and the screen, the charge travels through a constant electric field pointing in the positive x direction. what should the magnitude e of the electric field be if the charge is to hit the target on the screen? express your answer in terms of m, q, y(h), v(0), and l.