Hess’s Cycle Question 3

$C_{(s)}+O_2_{(g)}\rightarrow CO_2_{(g)}\: \: \: \: \Delta H: -393.5kJ$

$2CO_{(g)}+O_2_{(g)}\rightarrow 2CO_{2(g)}\: \: \: \: \Delta H: -565.9kJ$

Find the enthalpy of reaction for the following reaction:

$2C_{(s)}+O_2_{(g)}\rightarrow 2CO_{(g)}\: \: \: \: \Delta H: \: ?kJ$

$clockwise = anticlockwise$

${\color{Magenta} x}{\color{Red} -565.9} = {\color{Blue} 2(-393.5)}$

$x=-221.1kJ$