Question

2. Carbon dioxide can be formed from the reaction of carbon monoxide and oxygen. How

many moles of carbon monoxide must be reacted in order to produce 147 kJ of energy?
2 CO + O2 + 2 CO2
AH = -787 kJ

Answer 1

Answer: 0.374 mol CO2

Step-by-step explanation:

We can calculate the number of moles of CO, n, required to produce the specified quantity of heat. This is done by dividing the required released heat, q, by the enthalpy of formation per unit mole of the substance,
`{\Delta H}{2\ mol\ CO}`, based on the chemical equation, such that:

`$$We have the following values for the variables:\displaystyle q = -147\ kJ \\\displaystyle \Delta H = -787\ kJ`

`$$We proceed with the solution:\begin{align} \displaystyle n &= (q)/( (\Delta H)/(2\ mol\ CO))\\ &= (-147\ kJ)/((-787\ kJ)/(2\ mol\ CO))\\ &\approx \boxed{\mathbf{ 0.374\ mol}} \end{align}`

Therefore, 0.374 mol of CO2 must be reacted in order to produce 147 kJ of energy?