Answer
$-276.9\ kJ/mol$
Work Step by Step
From the data given:
$\begin{smallmatrix}
2\ C(s)+2\ O_2(g)&\rightarrow&2\ CO_2(g)&-787\ kJ/mol\\
2\ CO_2(g)+3\ H_2O(l)&\rightarrow&3\ O_2(g)+C_2H_5OH(l)&+1367.5\ kJ/mol\\
3\ H_2(g)+3/2\ O_2(g)&\rightarrow&3\ H_2O(l)&-857.4\ kJ/mol\\
\hline\\
2\ C(s)+3\ H_2(g)+1/2\ O_2(g)&\rightarrow&C_2H_5OH(l)&-276.9\ kJ/mol
\end{smallmatrix}$
