While shadowing a dentist Evelyn learns that lasers are the next big thing in "holistic" dentistry, so she volunteers in a Physics Lab at UCI that. But before they trust her with lasers, however, they have Evelyn design the gas power cycle that will power the laser. In Evelyn's power cycle, air is initially at a pressure of 420 kPa and a volume of 3 m³. In the first step, the air undergoes Isochoric compression to a pressure of 750 kPa. In the second step, it undergoes isobaric expansion to a volume of 7 m³. In the third step, the air undergoes isothermal expansion until its pressure drops to 420 kPa. In the fourth and final step, the air undergoes isobaric contraction to a volume of 3 m². What is the net heat flow, per cycle, for Evelyn's cycle? [Hint: Draw a PV diagram of the process. It will help.] O 1.738 kJ 860 kJ O2.054 kJ O 3.173 kJ

While shadowing a dentist Evelyn learns that lasers are the next big thing in "holistic" dentistry, so she volunteers in a Physics Lab at UCI that. But before they trust her with lasers, however, they have Evelyn design the gas power cycle that will power the laser. In Evelyn's power cycle, air is initially at a pressure of 420 kPa and a volume of 3 m³. In the first step, the air undergoes Isochoric compression to a pressure of 750 kPa. In the second step, it undergoes isobaric expansion to a volume of 7 m³. In the third step, the air undergoes isothermal expansion until its pressure drops to 420 kPa. In the fourth and final step, the air undergoes isobaric contraction to a volume of 3 m². What is the net heat flow, per cycle, for Evelyn's cycle? [Hint: Draw a PV diagram of the process. It will help.] O 1.738 kJ 860 kJ O2.054 kJ O 3.173 kJ

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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Concept explainers

Kinetic Theory of Gas

The Kinetic Theory of gases is a classical model of gases, according to which gases are composed of molecules/particles that are in random motion. While undergoing this random motion, kinetic energy in molecules can assume random velocity across all directions. It also says that the constituent particles/molecules undergo elastic collision, which means that the total kinetic energy remains constant before and after the collision. The average kinetic energy of the particles also determines the pressure of the gas.

P-V Diagram

A P-V diagram is a very important tool of the branch of physics known as thermodynamics, which is used to analyze the working and hence the efficiency of thermodynamic engines. As the name suggests, it is used to measure the changes in pressure (P) and volume (V) corresponding to the thermodynamic system under study. The P-V diagram is used as an indicator diagram to control the given thermodynamic system.

Question

While shadowing a dentist, Evelyn learns that lasers are the next big thing in "holistic" dentistry, so she volunteers in a Physics Lab at UCI. But before they trust her with lasers, however, they have Evelyn design the gas power cycle that will power the laser.

In Evelyn's power cycle, air is initially at a pressure of 420 kPa and a volume of 3 m³. In the first step, the air undergoes isochoric compression to a pressure of 750 kPa. In the second step, it undergoes isobaric expansion to a volume of 7 m³. In the third step, the air undergoes isothermal expansion until its pressure drops to 420 kPa. In the fourth and final step, the air undergoes isobaric contraction to a volume of 3 m³. What is the net heat flow, per cycle, for Evelyn's cycle? [Hint: Draw a PV diagram of the process. It will help.]

Options:
- 1,738 kJ
- 860 kJ
- 2,054 kJ
- 3,173 kJ

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Step 1: Determine the given variables.

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Step 2: Determine the P-V diagram for the processes mentioned

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Step 3: Determine the expression for the net heal flow per cycle and Work during process 1 to 2 and 2 to 3

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Step 4: Determine the work done during the process 3 to 4 and 4 to 1

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Step 5: Determine the net heat flow per cycle

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