4- Which of the following statement are correct? (True/False) a. The energy of t

Question

4-
Which of the following statement are correct? (True/False)

a. The energy of the universe remains constant but the entropy of the universe steadily increases.

b. To be internally reversible a process must have no finite driving forces and no non-uniformity within the process.

c. An ideal Carnot cycle has two isothermal and two adiabatic steps, all of them reversible.

d. A U-tube manometer is used to measure pressure.

e. The entropy of 1kg of an ideal gas increases when its pressure is decreased isothermally.

f. The entropy of 1kg of a non- ideal gas decreases when its pressure is increased isothermally.

g. The entropy of any material increases when it undergoes a full irreversible cycle.

h. The entropy change of any material undergoing a full reversible cycle is zero.

i. The sum of the entropy of materials in an isolated cycle can decrease.

j. In an adiabatic flow process, the total entropy of the products is equal to or greater than the total input.

Explanation / Answer

a) True

b) True

c) True

d) True

e) True

f) False

g) True

h) True

i) False

j) True

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