ch19-p077

# ch19-p077 - 77(a The final pressure is pf = pVi 32 atm(1.0...

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(d) The final pressure is () 53 1.0L 32atm 3.2atm. 4.0L i fi f V pp V γ §· == = ¨¸ ©¹ (e) The final temperature is ( ) ( ) ( ) 3.2atm 4.0L 300K 120K 32atm 1.0L ff i f ii pVT T pV = . (f) The work done is ( ) ( ) ( ) int int 3 3 33 22 3 3.2atm 4.0L 1.01 10 Pa atm 10 m L 2 2.9 10 J . i i W Q E E nR T p V =− Δ = Δ= ªº × ¬¼ (g) If the gas is diatomic, then = 1.4, and the final pressure is 1.4 4.6atm i f V V = . (h) The final temperature is ( ) ( ) ( ) 4.6atm 4.0L 300K 170K i f T = . 77. (a) The final pressure is ( ) 8.0atm, f f p V = (b) For the isothermal process the final temperature of the gas is T f = T i = 300 K. (c) The work done is ( ) 3 3 ln ln 32atm 1.01 10 Pa atm 1.0 10 m ln 4.4 10 J. i VV Wn R T p V = × × For the adiabatic process

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ch19-p077 - 77(a The final pressure is pf = pVi 32 atm(1.0...

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