For a spontaneous process, the correct statement is:a)Entropy of the system always increases. b)Free energy of the system always increases.c)Total entropy change is always negative. d)Total entropy change is always positive.Correct answer is option 'D'. Can you explain this answer?

Question

For a spontaneous process, the correct statement is:a)Entropy of the system always increases.     b)Free energy of the system always increases.c)Total entropy change is always negative.      d)Total entropy change is always positive.Correct answer is option 'D'. Can you explain this answer?

Answer

Explanation:

Spontaneous processes are those processes which occur without any external intervention. These processes occur naturally and are irreversible.

The correct statement for a spontaneous process is:

Total entropy change is always positive.

Entropy:

Entropy is a measure of the degree of randomness or disorder in a system. It is denoted by the symbol 'S'.

The second law of thermodynamics states that the entropy of an isolated system always increases over time. This means that the degree of disorder of the system always increases with time.

Free energy:

Free energy is the energy available to do work in a system. It is denoted by the symbol 'G'.

For a spontaneous process, the free energy of the system always decreases. This means that the energy available to do work in the system decreases during a spontaneous process.

Total entropy change:

The total entropy change is the sum of the entropy changes of the system and its surroundings.

For a spontaneous process, the total entropy change is always positive. This means that the degree of disorder of the system and its surroundings always increases during a spontaneous process.

Conclusion:

The correct statement for a spontaneous process is that the total entropy change is always positive. This means that the degree of disorder of the system and its surroundings always increases during a spontaneous process.

Answer

Answer

In spontaneous process entropy goes on increasing hence change in entropy is positive

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