(+10) Answer the following questions. a. Identify each of the following terms as

Question

(+10) Answer the following questions.
a. Identify each of the following terms as an intensive property, extensive property, or not a
state property.
i. Pressure
ii. Temperature
iii. Work
iv. Entropy
v. Internal Energy
vi. Mass
vii. Specific Volume
viii. Heat
ix. Density
x. Enthalpy
b. In 10 words or less, define Entropy
c. Answer the following:
i. Can the entropy of a system ever decrease?WHY?
ii. What happens to the overall entropy of the universe?
iii. What are the three main causes of irriversbilities in a process?

Explanation / Answer

Extensive properties scale with the size of the system under consideration. On the contrary, intensive properties are independent of the size of the system.

i. Pressure is an intensive property

ii. Temperature is an intensive property

iii. Work is not a state property

iv. Entropy is an extensive property
v. Internal Energy is an intensive property
vi. Mass is an extensive property
vii. Specific Volume is an intensive property
viii. Heat is an extensive property
ix. Density is an intensive property
x. Enthalpy is an extensive property

b. Entropy is a thermodynamic quantity used to express the degree of randomness in a system.

c. i. Entropy of a system can decrease only when it interacts with some other system whose entropy increases in the process.

ii. However, total entropy of the universe (i.e., system+surroundings) can never decrease.

iii. Three main causes of irreversibility in a process are

-----friction

------unrestrained expansion of a fluid

------mixing of two different substances

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