Entropy

Question 1

What is true for the Clausius inequality?

Answer 1

the cyclic integral is always less than or equal to zero

Question 2

What is the Clausius inequality true for?

Answer 2

all cycles, including reversible and irreversible

Question 3

What can be said about the Clausius integral for a reversible reaction?

Answer 3

equal to zero

Question 4

What can be said about the Clausius integral for an irreversible reaction?

Answer 4

<0

Question 5

What are properties?

Answer 5

variables that are not process dependent and depend only on initial and final states.

Question 6

What is the third law of thermodynamics?

Answer 6

the entropy of a pure crystalline substance at absolute zero temperature is zero

Question 7

What does the entropy equation become if there are energy losses?

Answer 7

Q+Ef = T

Question 8

What is the heat transfer for an adiabatic reaction?

Answer 8

Q=0

Question 9

What is the change in entropy if a process is reversible?

Answer 9

delta s = 0

Question 10

What is the name for a reversible adiabatic process?

Answer 10

there is constant entropy and it is termed isentropic

Question 11

What is the increase of entropy principle?

Answer 11

The entropy of an isolated system during a process always increases or in the limiting case of a reversible process, remains constant

Question 12

What is the performance of thermodynamic systems degraded by?

Answer 12

irreversibilities