Lecture 02 Flashcards
1
Q
What is thermodynamics?
A
The relationship between heat and work, and the study of heat engines.
2
Q
What is the equation for Carnot efficiency?
A
ETAsubTH,MAX=1-(TsubL-TsubH)
3
Q
What is the equation for second law efficiency?
A
ETAsubTH,II=(ETAsubTH)/(ETAsubTH,MAX)
4
Q
Why is second law efficiency always less than 1?
A
Because of irreversibility (friction, wear, etc)
5
Q
What’s the first law of thermo?
A
Law of conservation of energy
6
Q
What’s the second law of thermo?
A
Entropy never decreases
7
Q
Why is it important to increase qsubL when increasing work?
A
Because the system could overheat (car example).
