ocr: €- ch 116 1989 quiz 2 page 2 3.( (15 points) Estimate the standard enthalpy change, AH°. for the reaction M2 + - 3H2 2MH3 from the following bond energies: N-H 391 kJ/mol N-N (single) 160 kJ/mol H-H 432 kJ/mol N:N (double) 418 kJ/mol bonds broken bancs formed NEN (tripie) 941 kJ/mol NEN 3.3(N-H 3(H - -#) OH' D(bonds broken) -ED(boyls fxmal) 1 DAEN) + 3D(H- - 6D(N-H) 941 - + 3(432)-4(39) AH. -109 KJ/mol 4. (32 points) Give the Lewis structure for each of the following species CHA H -C-H co2 d=c=0: H20 N2 :NEN: - NH, MH, HT 930-0=0: :0=0-8: PO C1 H-N-W 1 t C H
