HW Ch21 - HW Ch. 21 First Law of Thermodynamics Chapter 21:...

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HW Ch. 21 First Law of Thermodynamics Chapter 21: First Law of Thermodynamics Conceptual problems 21.C. 1 (5.00) A gas is enclosed in a container whose walls are made of a material that is flexible and which acts as a perfect insulator for all practical purposes. A thermal process takes place on the gas. What would be the best model for the type of process? adiabatic Constant-volumeIsobaricAdiabaticIsothermal (0/2 submissions used) Section 0: Introduction 21.0.1 (5.00) Use the simulation in the interactive problem in Section 21.0 to answer the following questions. (a) What is the relationship between the amount of heat transferred to the gas and the change in the internal energy of the gas during the first process when the volume is fixed? (b) How do the values for the work and change in internal energy relate during the second process when no heat flows in or out of the gas? (c) In general, how does the amount of heat transferred to the gas relate to the change in internal energy and the work it does? The heat is equal to the change in I e The work done is the neg of the change in ie The net heat transferred is equal to the sum of the change in ie n work done (a) The heat is greater thanequal toless than (0/1 submissions used) the change in internal energy. (b) The work done is equal tothe negative of (0/1 submissions used) the change in internal energy. (c) The net heat transferred is greater thanequal toless than (0/1 submissions
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used) the sum of the change in internal energy and the work done. Section 1: First law of thermodynamics 21.1.1 (5.00) In the gym, you do a workout routine that causes you to lose 3.4×10 5 J of heat while performing 1.7×10 5 J of work. With yourself as the system, state the following quantities for the first law of thermodynamics, with the appropriate signs: (a) Q , (b) Δ E int , (c) W . (a) (0/6 submissions used) J -3.4e5 (b) (0/6 submissions used) J -5.1e5 (c) (0/6 submissions used) J 1.7e5 21.1.3 (5.00) A sealed container of gas with a piston is well-insulated, so that no heat is transferred to it or from it. The gas performs 1700 J of work on its surroundings.
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This note was uploaded on 05/11/2011 for the course PHYS 1401 taught by Professor Broyles during the Spring '08 term at Collin College.

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HW Ch21 - HW Ch. 21 First Law of Thermodynamics Chapter 21:...

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