April 27

# April 27 - General Physics III Homework Assignments Cory...

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General Physics III Homework Assignments Cory poynter 21- 4, 11, 19, 26, 28, 43, 45, 59 4) Time Δt = 1s Number of nitrogen molecules (N) = 5 x 10^23 Mass of one mole(m) = 4.68 x 10^-26 kg Velocity vi = 300m/s Area of wall (A) = 8 x 10^-4 m^2 Average force on wall; nitrogen gas = * F 2 m * vi * N t = . 24 68 x 10 - ( ) 26300 5 x 1023 1s = . 14 04N = P FA = . ( P 14 04NA 8 x 10 - ) 4m2 = / 17550 N m^2 11) Boltzmann’s constant kB = 1.38 x 10^-23 J/K Gas constant R = 8.31J/mol.K Mass of helium mh = 4 x 10^-3 kg/mol Mass of argon mar = 40 X 10^-3 kg/mol A) (K.E.)= 3KBT2 temperature is same; average kinetic energy of obth gases are same; .= . 31 38 X 10 - ( ) 23 423 2 = . - 8 76 X 10^ 21J B) 3RTmH RMS speed of helium gas

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C) . ( ) - 3 X 8 314 423 4 X 10^ 3 D) =1.624 km/s E) 3RTmAr RMS speed of argon gas F) . ( ) - 3 X 8 314 423 40 X 10^ 3 G) =513.5 m/s H) I) 19) No of moles (n) =2 J) Starting pressure Pi = 5atm K) Starting volume Vi = 12L L) Final volume Vf = 30L M) Diatomic gas Y=1.4 N) a) Pf = PiViyVfy adiabatic process O) = 5 . 12301 4 P) = 1.386 atm Q) b) = Ti PiVinR c) = . ( 51 013 x 105Pa 12 x 10 - ) ( . . ) 3m3 2mol 8 314Jmol K
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April 27 - General Physics III Homework Assignments Cory...

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