Entropy of system always increases in a spontaneous process.this statement is true or false

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True bcz for any rxn entropy of universe increases

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It's true

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True.

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Ya it is true

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True

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Second law of thermodynamics   states that entropy of a spontaneous reaction always increases

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I think its false,, in place of system there should be universe..

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Dear Riya read ncert textbook ... proof is also given there it's true

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True

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No answer is false

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FalseCorrect:-“Total” entropy always increases in a spontaneous process

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Its false bcoz system should be isolated

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True

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True: The entropy of a system always increases in a spontaneous process.

Explanation:

Spontaneous Processes:
A spontaneous process is a physical or chemical change that occurs without any external influence or intervention. It proceeds on its own without the need for an input of energy or work from the surroundings. Spontaneous processes tend to occur in the direction that leads to an increase in the overall entropy of the system and its surroundings.

Entropy:
Entropy is a thermodynamic property that measures the disorder or randomness of a system. It is denoted by the symbol 'S' and is a quantitative measure of the number of possible arrangements or microstates that are consistent with the macroscopic state of the system. In simpler terms, entropy can be understood as a measure of the system's tendency to move towards a more disordered state.

Second Law of Thermodynamics:
The second law of thermodynamics states that the total entropy of an isolated system always increases over time. It implies that in any spontaneous process, the entropy of the system and its surroundings combined will always increase.

Reasoning:
The increase in entropy during a spontaneous process can be understood based on the statistical probability of molecular arrangements. In a system with a higher entropy, there are more possible microstates or arrangements that are consistent with the macroscopic state. Therefore, as the system undergoes a spontaneous process, it tends to move towards a state with a higher number of available microstates, increasing the overall entropy.

Examples:
1. Dissolution of a solute in a solvent: When a solute dissolves in a solvent, the random movement of solute particles spreads them throughout the solvent, increasing the overall disorder of the system and the entropy.
2. Mixing of gases: When different gases are mixed, their individual molecules become randomly distributed, leading to an increase in entropy.
3. Expansion of a gas: When a gas expands into a larger volume, the molecules occupy a larger region, increasing the number of available microstates and thus the entropy.

Conclusion:
Based on the second law of thermodynamics, the entropy of a system always increases in a spontaneous process. This can be explained by the statistical probability of molecular arrangements and the tendency of the system to move towards a more disordered state.

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