Consider the following balanced reaction:

$\displaystyle {2}\text{A}_{{2}}+\text{B}\to\text{C}+{2}\text{D}$

What is the enthalpy of reaction if the enthalpy of formation of the compounds is given as $\displaystyle \text{A}_{{2}}$ = -17.05 kJ/mol; B = 23.98 kJ/mol; C = 10.21 kJ/mol; D = 10.38 kJ/mol.

Record your answer in scientific notation using 3 significant figures.