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Thermodynamics: Isochoric Process

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A 2-kW baseboard electric resistance heater in a vacant room is turned on and kept on for 15 min. The mass of the air in the room is 75 kg, and the room is tightly sealed so that no air can leak in or out. The temperature rise of air at the end of 15 min is:

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Solution Summary

The air in a sealed room is heated by a heater for given time. The final temperature of the room is calculated.

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Simple Ways of Expanding in thermodynamic processes

Please see attached file for full problem.

Simple Ways of Expanding

Part A
What type of process does curve OA represent?
A) adiabatic
B) isobaric
C) isochoric
D) isothermal

Part B
What type of process does curve OC represent?
A) adiabatic
B) isobaric
C) isochoric
D) isothermal

Part C
The pressure of the system in state B is ________ the pressure of the system in state O.
A) greater than
B) less than
C) equal to

Part D
The work done by the system is ________.
A) greater than zero
B) less than zero
C) equal to zero

Part E
The temperature of the system in state B is ________ the temperature of the system in state O.
A) greater than
B) less than
C) equal to

Part F
The internal energy of the system in state B is ________ the internal energy of the system in state O.
A) greater than
B) less than
C) equal to

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