Question

The complete combustion of propane, C3H8 in the presence of an excess amount of

oxygen gas, results in the formation of carbon dioxide gas and water. If 220g of propane fully reacted, how many grams of water were produced ?

Answer 1

The balanced equation is given by

• 2 C3H8 + 9 O2 → 4 CO2 + 2 CO + 8 H2O + Heat

Moles of propAne

• Given mass/Molar mass
• 220/44
• 5mol

2 mol of propane produces 8 mol water

1 mol produces 4mol water

moles of water

• 4(5)
• 20mol

Mass of water

• 20(18)
• 360g