chapter_5_examples

# chapter_5_examples - L•atm mol•K = 1 atm = 54.5 g/mol...

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Oct. 29: No lab Nov. 5: Lab 6 Oct. 29: Lab 6 Nov. 5: Lab 7 Old schedule New schedule Nov. 12: Lab 7 Nov. 12: No lab

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What is the volume (in liters) occupied by 49.8 g of HCl at STP? PV = nRT V = nRT P T = 0 0 C = 273.15 K P = 1 atm n = 49.8 g x 1 mol HCl 36.45 g HCl = 1.37 mol V = 1 atm 1.37 mol x 0.0821 x 273.15 K L•atm mol•K V = 30.7 L
Argon is an inert gas used in lightbulbs to retard the vaporization of the filament. A certain lightbulb containing argon at 1.20 atm and 18 0 C is heated to 85 0 C at constant volume. What is the final pressure of argon in the lightbulb (in atm)? PV = nRT n, V and R are constant nR V = P T = constant P 1 = 1.20 atm P 2 = ? P 1 T 1 P 2 T 2 = T 1 = 291 K T 2 = 358 K P 2 = P 1 x T 2 T 1 = 1.20 atm x 358 K 291 K = 1.48 atm

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A 2.10-L vessel contains 4.65 g of a gas at 1.00 atm and 27.0 0 C. What is the molar mass of the gas? dRT P M = d = m V 4.65 g 2.10 L = = 2.21 g L 2.21 g L x 0.0821 x 300.15 K

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Unformatted text preview: L•atm mol•K = 1 atm = 54.5 g/mol Ammonia burns in oxygen to form nitric oxide (NO) and water vapor. How many volumes of NO are obtained from one volume of ammonia at the same temperature and pressure? 4NH 3 + 5O 2 4NO + 6H 2 O 1 mole NH 3 1 mole NO At constant T and P 1 volume NH 3 1 volume NO Gas Stoichiometry What is the volume of CO 2 produced at 37 C and 1.00 atm when 5.60 g of glucose are used up in the reaction: C 6 H 12 O 6 ( s ) + 6O 2 ( g ) 6CO 2 ( g ) + 6H 2 O ( l ) g C 6 H 12 O 6 mol C 6 H 12 O 6 mol CO 2 V CO 2 5.60 g C 6 H 12 O 6 1 mol C 6 H 12 O 6 180 g C 6 H 12 O 6 x 6 mol CO 2 1 mol C 6 H 12 O 6 x = 0.187 mol CO 2 V = nRT P 0.187 mol x 0.0821 x 310.15 K L•atm mol•K 1.00 atm = = 4.76 L...
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## This note was uploaded on 02/10/2011 for the course CHEM 201 taught by Professor Griffen during the Fall '09 term at Bunker Hill.

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chapter_5_examples - L•atm mol•K = 1 atm = 54.5 g/mol...

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