Question

Which of the following statements is true? The entropy of the universe
A. Increases and moves towards maximum value
B. Decreases and moves to zero
C. Remains constant
D. Decreases and increases with a periodic rate

Answer 1

Hint :Entropy is a measured physical attribute that is most usually linked with a condition of disorder, unpredictability, or uncertainty. The phrase and idea are utilised in a wide range of domains, from classical thermodynamics, where it was originally discovered, through statistical physics' microscopic description of nature, to information theory's principles. It has a wide range of applications in chemistry and physics, biological systems and their relationships to life, cosmology, economics, sociology, weather science, climate change, and information systems, including telecommunications.

Complete Step By Step Answer:
The loss of energy available to conduct work is referred to as entropy. The overall entropy of a system either grows or remains constant; it never decreases, according to another version of the second rule of thermodynamics. In a reversible process, entropy is zero; in an irreversible process, it grows. The universe's ultimate fate is expected to be thermodynamic equilibrium, in which the universal temperature remains constant and there is no energy available to accomplish work. In a closed system, entropy is also linked to the inclination toward disorder.
The larger the number of microstates in a system, the higher the entropy. The entropy of the cosmos grows throughout a spontaneous event. The entropy (S), a state function whose value increases as the number of accessible microstates grows, is a measure of a system's disorder. All intermediate stages between extremes are equilibrium states in a reversible process; it can change direction at any point. An irreversible process, on the other hand, occurs in just one way. The quantity of heat transmitted divided by the temperature is the change in entropy of the system or its surroundings.
\[\Delta S = \dfrac{{{q_{rev}}}}{T}\]
Hence option a is correct

Note :
The second law of thermodynamics asserts that the entropy of the world remains constant in a reversible process, but the entropy of the universe grows in an irreversible process, such as the transfer of heat from a hot item to a cold item.