Lithium oxide is an effective absorber of carbon dioxide and can be used to purify air in confined areas such as space vehicles. What volume of carbon dioxide can be absorbed by 1.00 kg of lithium oxide at 25°C and 1.00 atm? Li₂O(aq) + CO₂(g) → Li₂CO₃(s) A)687 mL B)819 mL C)687 L D)819 L E)22.4 L

Question

Quizplus · Accepted Answer

According to the balanced chemical equation, 1 mole of lithium oxide reacts with 1 mole of carbon dioxide to form 1 mole of lithium carbonate. From the molar mass of Li2O (29.88 g/mol) and CO2 (44.01 g/mol), we can calculate that 1 kg of Li2O is equal to 33.43 moles of Li2O. Therefore, 33.43 moles of CO2 can be absorbed by 1 kg of Li2O. Using the ideal gas law, we can convert this to volume at the given conditions:

PV = nRT

V = nRT/P

V = (33.43 mol)(0.08206 L·atm/mol·K)(298 K)/(1 atm)

V = 819 L

Therefore, 1.00 kg of lithium oxide can absorb 819 L of carbon dioxide at 25°C and 1.00 atm.

Lithium Oxide Is an Effective Absorber of Carbon Dioxide and Can