Este Quiz é cronometrado.
Você tem 10 minutos para completar as 10 questões deste quiz..
What does the area inside a closed cycle on a PV Diagram tell us?
The work done during the cycle
The energy lost in one cycle
The pressure and volume of a system
The velocity of a cycle
Which of the following processes are isothermal?
ab
bc
cd
da
None of the processes are isothermal
Which of the following processes are isobaric?
None of the processes are isobaric
Which of the following processes are isochoric?
None of the processes are isochoric
What is the total change in energy for a closed cycle PV diagram?
Always equal to zero
Equal to the work done by the system
Equal to the work done on the system
The total area under the PV diagram curves
We define thermal efficiency as:
The ratio of heat input to work output
The ratio of heat input to cold output
The ratio of cold input to heat output
The ratio of work done to cold output
An automobile engine has an efficiency of 20% and produces an average of 23,000 J of mechanical work per second during operation. How much heat input is required?
3 SF.
E = Joules
An automobile engine has an efficiency of 20% and produces an average of 23,000 J of mechanical work per second during operation. How much heat is discharged as waste heat from this engine per second?
2 SF.
What is unique about a Carnot Cycle heat engine?
It has no energy loss and is 100% efficient
It has equal hot and cold work inputs
It has double the heat input as cold output
It has the maximum possible efficiency of 99%
1200 J of heat flowing spontaneously through a copper rod from a hot reservoir 650 K to a cold reservoir at 350 K. Determine the amount by which this irreversible process changes the entropy of the universe, assuming that no other changes occur.
First blank is for the numeric value. The second blank is for the units, putting a space between all characters.
s =