Question

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 ΔH = -787 kJ

Answer 1

0.374 moles of carbon monoxide

Step-by-step explanation:

Let's consider the following balanced thermochemical equation.

2 CO + O₂ ⇒ 2 CO₂ ΔH = -787 kJ

According to this balanced thermochemical equation, 787 kiloJoules of heat are released (this is the meaning of the minus sign) when 2 moles of carbon monoxide react. The moles of carbon monoxide that must react to produce 147 kJ of energy are:

(-147 kJ) × 2 mol CO/(-787 kJ) = 0.374 mol CO