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

Question

Answer

True bcz for any rxn entropy of universe increases

Answer

It's true

Answer

True.

Answer

Ya it is true

Answer

True

Answer

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

Answer

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

Answer

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

Answer

True

Answer

No answer is false

Answer

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

Answer

Its false bcoz system should be isolated

Answer

True

Answer

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.

Similar Class 11 Doubts

Identify the correct statement regarding a spontaneous process –[AIEEE 2007]

Identify the correct statement for change of Gibbs energy for a system (ΔGsystem) at constant temperature and pressure : [2006]

Which of the following statements is correct for any thermodynamic system ? [aieee-2004]

The entropy change can be calculated by using the expression When water freezes in a glass beaker, choose the correct statement amongst the following

During winters, moisture condenses in the form of dew and can be seen on plant leaves and grass. The entropy of the system in such cases decreases as liquids possess lesser disorder as compared to gases. With reference to the second law, which statement is correct, for the above process ?

Top Courses for Class 11View all

Chemistry Class 11

CUET Mock Test Series

English Class 11

Chemistry Practice Tests: CUET Preparation

CUET Mock Test: Humanities Subjects 2025

Top Courses for Class 11

Top Courses for Class 11

Suggested Free Tests

Related Content

Schools

Competitive Examinations

Quick Access Links

Technical Exams