Quiz Key 3 - Chemistry 152A Quiz # 3 (April 22, 2008)...

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Chemistry 152A Tuesday Quiz (@ end of period) Quiz # 3 (April 22, 2008) Value: 10 points; Time: 10 minutes Name ______KEY __________________ Section _________________ Compare with problems Z10.9, Z10.25 2 1 ln rev ext q V Eqww PVw n R T S VT ⎛⎞ Δ=+ = − Δ = Δ= ⎜⎟ ⎝⎠ () ( ) 8.3 273 J R T K T C PV nRT mol K == + ° = For all of the short answer questions below, explain your conclusion. Q) One mole of an ideal monatomic gas is contained in a cylinder with a movable piston. The temperature is kept constant at 100C. Weights are removed suddenly from the piston to cause the pressure to drop from 5 to 2Atm. The gas expands to come to equilibrium with the new external pressure. a) What is the work (in joules) to go between these two states. () 12 1 2 22 22 1 2 2 1 1 11 373 5 2 1 23 9 8.3 373 1 3 2 55 5 ext ext T T K P P P Atm PV nRT PP w P V P V V PV PV nRT wk J = = ⎫⎧ =− Δ =−
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This note was uploaded on 05/02/2008 for the course ENVL 111 taught by Professor Unknown during the Fall '07 term at University of Washington.

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