Question

31. Use the equation given below to answer the following question: If 755 kJ of heat was absorbed, what mass of carbon dioxide reacted?

2CO2 + 43.9 kJ → 2CO +O2

Answer 1

1514g of CO₂ reacted

Step-by-step explanation:

Based on the reaction:

2CO₂ + 43.9kJ → 2CO + O₂

2 moles of carbon dioxide require 43.9kJ of energy to produce 2 moles of carbon monoxide and 1 mole of oxygen

To solve this question, we must convert the 755kJ of energy to moles of carbon dioxide that reacts and to find the mass as follows:

755kJ * (2 moles CO₂ / 43.9kJ) =34.4 moles of CO₂ are produced

Mass CO₂: Molar mass: 44.01g/mol

34.4 moles CO₂ * (44.01g / mol) =

1514g of CO₂ reacted