Heat Engines Flashcards
1
Q
How does the second law of thermodynamics relate to a heat engine
A
Heat energy flow spontaneously from a hot reservoir to a cold sink
2
Q
What is the equation for work done by a heat engine
A
Work done = Qh - Qc
3
Q
What is the equation for efficiency of a heat engine
A
Efficiency = Qh - Qc / Qh
4
Q
Why is maximum efficiency always less than 1
A
Because some energy is always wasted
5
Q
What is the equation for maximum efficiency
A
1 - Tc/Th
T = temperature In Kelvin
