gas-stoichiometry

# gas-stoichiometry - Gas Stoichiometry STP: Temp: 0 Celsius...

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Gas Gas Stoichiometry Stoichiometry

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STP: Temp: 0 Celsius Pressure: 1 atmosphere, or 760 torrs If given liters/volume, use ideal gas law first If given grams, or moles, use ideal gas law last after gas stoichiometry Know the conversion of torrs to atmosphere
Gas Stoichiometry Gas Stoichiometry We have looked at stoichiometry: 1) using We can use stoichiometry for gas reactions. As before, we need to consider mole ratios when examining reactions quantitatively. At times you will be able to use 22.4 L/mol at STP and 24.8 L/mol at SATP as shortcuts. grams (x) moles (x) moles (y) grams (y) molar mass of y mole ratio from balanced equation molar mass of x P, V, T (x) P, V, T (y) PV = nRT

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Sample problem 1 Sample problem 1 CH 4 burns in O 2 , producing CO 2 and H 2 O(g). A 1.22 L CH 4 cylinder, at 15°C, registers a pressure of 328 kPa. a) What volume of O 2 at SATP will be required to react completely with all of the CH 4 ? First: CH 4 (g) + 2O 2 (g) CO 2 (g) + 2H 2 O(g) PV = nRT (8.31 kPa•L/K•mol)(288 K) (328 kPa)(1.22 L) = n = 0.167 mol P = 328 kPa, V = 1.22 L, T = 288 K mol O 2 = 0.167 mol CH 4 2 mol O 2 1 mol CH 4 x = 0.334 mol PV = nRT (100 kPa) (0.334 mol)(8.31 kPa•L/K•mol )(298 K) =V = 8.28 L P= 100 kPa, n= 0.334 mol, T= 298 K or # L = 0.334 mol x 24.8 L/mol
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## This note was uploaded on 07/24/2009 for the course CHEM 45434 taught by Professor Michael during the Spring '09 term at Cosumnes River College.

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gas-stoichiometry - Gas Stoichiometry STP: Temp: 0 Celsius...

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