Gas Stoichiometry.

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Presentation transcript:

Gas Stoichiometry

Gas Stoichiometry When gases are involved, the coefficients in a balanced chemical equation represent not only molar amounts (mole ratios) but also relative volumes (volume ratios).

Volume-Volume Problems 1. What volume of oxygen gas is needed for the complete combustion of 4.00L of propane gas (C3H8)? Assume constant pressure and temperature. C3 H8 (g) + ___O2 (g)  ___CO2 (g) + ___H2O (g) 5 3 4

Volume-Volume Problems 2. How many liters of C3H8 is needed to produce 8.00L of CO2? C3 H8 (g) + 5O2 (g)  3CO2 (g) + 4H2O (g)

Volume-Volume Problems 3. What volume of oxygen is needed to completely combust 5.67 L of methane gas (CH4)? Write and balance the equation. CH4 (g) + 2O2 (g)  CO2 (g) + 2H2O (g)