T P PA The P-V diagram to the right depicts two equilibrium states ("A" and "B") of two moles of an ideal gas confined w

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T P Pa The P V Diagram To The Right Depicts Two Equilibrium States A And B Of Two Moles Of An Ideal Gas Confined W 1 (207.88 KiB) Viewed 19 times

T P PA The P-V diagram to the right depicts two equilibrium states ("A" and "B") of two moles of an ideal gas confined within a piston which both lie on the same isotherm (a curve which represents a collection of equilibrium states that all have the same temperature). You are supplied with a meter stick and a thermometer, so you can determine the volume of the piston and the temperature of the gas at any stage. Suppose you take the system from state B to state A. You do this in two stages: First you compress the gas isobarically to the final volume, then you raise the pressure to the final pressure in an isochoric process. You measure the two volumes to V = 0.130m”, V, = 0.160m®, and before you start the compression, your thermometer measures the temperature of the gas to be: T = 292K P B be: V 1. (30 points) Sketch this two-stage process (including an arrow to indicate the direction) on the diagram above and use the sketch to compute the total work done on or by the gas (specify which) in joules. 2. (20 points) Find the total heat that enters or exits the system (specify which) during this two-stage process. Show your work and/or explain your reasoning. 3. (26 points) You repeat this two-stage process with two different gases - He and NZ. During the process, which gas will exhibit the greatest difference between its maximum and minimum internal energy, or will both be the same? Explain. 4. (24 points) If instead of the two-stage process described above, the system goes from the beginning to the final state isothermally, indicate what is physically happening to the system during the process by circling an answer in each case: a. The force applied to the piston from outside is being ( reduced / increased / held constant ). b. The gas in the piston is (insulated from the outside / dumping heat to the outside / receiving heat from the outside). The internal energy is (dropping / rising / dropping then rising / rising then dropping / staying constant). c.