SOL-2

# SOL-2 - Homework 2 Solutions 2.1 Step 1 Setup variables...

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2.1 Step 1: Setup variables, check units, and convert as necessary. Step 2: Use the perfect gas law to solve for the number of moles ( n ). Step 3: Calculate the molar mass using the known mass. mol g 16.4 mol 0.002 g 0.0335 : Step3 moles 0.002 K 298 mol K atm dm 0.08206 dm 0.25 atm 0.2 : 2 Step g 0.0335 mg 1000 g 1 mg 33.5 298K; ; dm .25 cm 1000 dm 1 cm 250 0.2atm; 760torr atm 1 torr 152 : 1 Step 0446653 0446653 3 3 3 3 3 3 = = = = × × = = = = × = = = × = = × = n m M n RT pV n nRT pV m T V p 2.2 Step 1: Setup variables, check units, and convert as necessary. Step 2: Use pefect gas equation to solve for pressure. Step 3: Use ‘van der Waals’ equation to solve for pressure. gas ideal for atm 273.5 dm 0.15 K 500 mol K atm dm 0.08206 mol 1 (ii) gas ideal for atm 1.000 dm 22.414 K 273.15 mol K atm dm 0.08206 mol 1 (i) ; : 2 Step mol K atm dm 0.08206 K; 500 mol; 1 ; dm 0.15 cm 1000 dm 1 cm 150 (ii) mol K atm dm 0.08206 K; 273.15 mol; 1 ; dm 22.414 (i) : 1 Step

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## This note was uploaded on 10/10/2009 for the course CHM 341 taught by Professor Richert during the Spring '08 term at ASU.

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SOL-2 - Homework 2 Solutions 2.1 Step 1 Setup variables...

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