P213_Exam__1_Solns_F06 - Physics 213 - Prelim 1 - Solution...

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Physics 213 - Prelim 1 - Solution Sheet 1. 1 to 5 F (correct answer is 0.2%),T, , T, F (only isochoric), F (only translational) 6 to 10 F, F, F, F (dSres<0), F 2. C 200 calories (dW = 0, so dQ =c dT = dU) 3. B <To(some solid must evaporate to reach phase equilibrium; thereby cooling the solid 4. B <P 3 (must be on the solid/gas phase line which slopes down to 0) 5 C (solid and gas) 6 R A = 2 0.5 R B = 2 -0.5 R C = 1 (KE of O and He are equal, so velocities must differ by inverse square root of masses. Momentum per collision is product of velocity and mass. Total momentum per unit time is proportional to produce of momentum per collision and velocity) 7. AB = isothermal, BC = isobaric, CA = adiabatic. For adiabatic, P = const/V γ where γ >1. For isothermal, P = const/V. For γ larger than 1, the pressure falls faster for a given volume than for γ =1. Thus, an adiabatic curve lies under an isothermal curve for volumes greater than their crossing point. 8. V
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This note was uploaded on 08/27/2009 for the course PHYS 2213 taught by Professor Perelstein,m during the Fall '07 term at Cornell University (Engineering School).

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P213_Exam__1_Solns_F06 - Physics 213 - Prelim 1 - Solution...

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