Given the Thermochemical Equation
4AlCl₃(s) + 3O₂(g) ? 2Al₂O₃(s) $\frac { 1 } { 3 }$

Multiple Choice

Given the thermochemical equation
4AlCl₃(s) + 3O₂(g) ? 2Al₂O₃(s) + 6Cl₂(g) ; ?_rH
= -529 kJ/mol-rxn
Find ?_rH
For the following reaction.
$\frac { 1 } { 3 }$ Al₂O₃(s) + Cl₂(g) ? $\frac{2}{3}$ AlCl₃(s) + $\frac { 1 } { 2 }$ O₂(g)

A) 88.2 kJ/mol-rxn
B) 264.5 kJ/mol-rxn
C) 529 kJ/mol-rxn
D) 176.3 kJ/mol-rxn
E) -176.3 kJ/mol-rxn