PS1_08-Solution

# PS1_08-Solution - Chem 444B Homework Set #1 - Solutions...

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Problem Set #1 -1- Chem 444B Homework Set #1 - Solutions DUE: Friday, January 25, 2008 1) (McQ&S 16-3) 32 6 2 55 5 2 11 2 2 . 5 4 1.00 33.9 980.67 1 1 100 1.01 10 1000 1 s 1 1.01 10 1.01 10 1.01 10 s 1.00 Ph g g mL in cm cm Pf t mL ft in cm s gk g cm P gm cm kg atm PP a Pa m Pa t m ρ ⎛⎞ ⎜⎟ ⎝⎠ = × × × × × × = 2) (McQ&S 16-11) 2 2 22 2 In the ideal-gas equation, all the variables except n are constant. Therefore, the number of moles of N must equal the number of moles of the unknown. 1 N 0.3625g N 0.01295 N 28 N For the un mol mol g ×= 2 known. .. 0.9175g unknown M= 70.9 0.01295 unknown The only homonuclear diatomic with this molar mass is Cl g mol mol = 3) (McQ&S 16-16) a) () 3 3 3 3 0.09416 10.62 dm 0.083145 400 353 0.09416 dm V mol mol dm bar K mol K RT P bar dm V mol == = =

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Problem Set #1 -2- b) () 2 3 6 2 33 2 3 dm bar 0.083145 400 9.3919 0.09416 0.090494 0.09416 9072 bar 1059 bar 8013 bar RT a P VbV bar dm K mol K mol P dm dm dm mol mol mol P P =− ⎛⎞ ⎜⎟ ⎝⎠ = c) 1 2 3 6 1 2 2 3 1 2 0.083145 400 0.09416 0.062723 bar 183.02 400 0.09416 0.09416 0.062723 1058 bar 619 ba RT A P VB TVV B bar K mol K P dm dm mol mol dm mol K dm dm dm K mol mol mol P + + r 439 bar P = d) ( ) ( ) 3 6 2 22 0.083145 400 0.09416 0.05632 bar 9.6938 0.09416 0.09416 0.05632 0.05632 0.09416 0.05632 879 bar 595 bar 284 bar RT P V VV V bar K mol K P dm dm mol mol dm mol dm dm mol mol P P α β ββ ++ =
Problem Set #1 -3- 4) Compare the pressure predicted by a)the ideal-gas equation and b)the van der Waals equation for 1.00 mol of n -octane confined to 20.0 dm 3 at 200 ° C.

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## This homework help was uploaded on 04/13/2008 for the course CHEM 444 taught by Professor Jameslis during the Spring '08 term at University of Illinois at Urbana–Champaign.

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PS1_08-Solution - Chem 444B Homework Set #1 - Solutions...

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