Cracking the SAT Chemistry Subject Test

28. The geometry of a molecule of SO 2 is

(A) linear

(B) bent

(C) trigonal    planar

(D) trigonal    pyramidal

(E) tetrahedral

29. What is the approximate ∆H for the reaction CH 4 + Cl 2 → CH 3 Cl

• HCl given the following bond energies:

C–H bond    =   410 kJ/mol

C–Cl    bond    =   330 kJ/mol

Cl–Cl   bond    =   240 kJ/mol

H–Cl    bond    =   430 kJ/mol

(A) +270    kJ

(B) +110    kJ

(C) +70 kJ

(D) −70 kJ

(E) −110    kJ