Energy and the First Law of Thermodynamics
Authored by Zaid Hatamleh
Physics
University
Used 5+ times
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11 questions
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1.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
In thermodynamics, the correct sign convention is:
In thermodynamics, the correct sign convention is:
W>0 means work done on the system
Q > 0 means heat transferred from the system
W > 0 means work done by the system
Q < 0 means heat transferred to the system
2.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Which statement about heat is correct?
Heat is a property stored inside a system
Heat is an energy transfer driven only by a temperature difference
Heat always equals work in any process
Heat is defined only in conduction
3.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
The thermal efficiency of a power cycle is:
4.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
The coefficient of performance (COP) of a refrigeration cycle is:
5.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Which expression correctly represents the energy balance for a closed system?
6.
FILL IN THE BLANKS QUESTION
3 mins • 1 pt
Determine the change in kinetic energy in [kJ].
(a)
Answer explanation
7.
FILL IN THE BLANKS QUESTION
3 mins • 1 pt
Determine the change in potential energy, in kJ.
(a)
Answer explanation
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