Home
Class 12
CHEMISTRY
For stretched rubber, Entropy...

For stretched rubber, Entropy

A

Increases

B

First increases then decreases

C

Decreases

D

First decreases then increases

Text Solution

AI Generated Solution

The correct Answer is:
To analyze the change in entropy when rubber is stretched, we can follow these steps: ### Step 1: Understand the Concept of Entropy Entropy is a measure of the disorder or randomness in a system. Higher entropy indicates a greater degree of disorder, while lower entropy indicates a more ordered state. **Hint:** Remember that entropy is related to the arrangement and movement of particles in a substance. ### Step 2: Analyze the State of Rubber Before Stretching In its natural, unstretched state, rubber has a certain level of molecular randomness. The molecules are arranged in a more disordered manner, allowing for various orientations and movements. **Hint:** Consider how the molecules are positioned in the unstretched rubber compared to when it is stretched. ### Step 3: Consider the Effect of Stretching on Molecular Arrangement When rubber is stretched, an external force is applied. This force aligns the molecules in a more orderly fashion, reducing their random orientations. The stretching causes the molecules to become more aligned along the direction of the applied force. **Hint:** Think about how the application of force influences the arrangement of molecules in the rubber. ### Step 4: Determine the Change in Randomness As the rubber is stretched, the randomness of the molecular arrangement decreases. This means that the system becomes more ordered due to the alignment of the molecules. **Hint:** Relate the decrease in randomness to the concept of entropy. What happens to entropy when randomness decreases? ### Step 5: Conclude the Change in Entropy Since the randomness of the system decreases when rubber is stretched, the entropy of the rubber also decreases. Therefore, we conclude that stretching rubber results in a decrease in entropy. **Hint:** Remember that a decrease in randomness corresponds to a decrease in entropy. ### Final Answer When rubber is stretched, the entropy decreases due to the alignment of molecules and reduction in randomness. ---
Doubtnut Promotions Banner Mobile Dark
|

Topper's Solved these Questions

  • THERMODYNAMICS

    AAKASH INSTITUTE ENGLISH|Exercise ASSIGNMENT (Section - B) Objective Type Questions|35 Videos

  • THERMODYNAMICS

    AAKASH INSTITUTE ENGLISH|Exercise ASSIGNMENT (Section - C) Previous Years Questions|60 Videos

  • THERMODYNAMICS

    AAKASH INSTITUTE ENGLISH|Exercise Exercise|50 Videos

  • THE SOLID STATE

    AAKASH INSTITUTE ENGLISH|Exercise Assignment (SECTION - D) (ASSERTION-REASON TYPE QUESTION)|20 Videos

Similar Questions

Explore conceptually related problems

A stretched rubber has

Name the type of energy (kinetic or potential ) possessed by a stretched rubber band.

Rubber is

A stretched rubber band has kinetic energy.

What kind of energy is possessed by the following ? (a) A stone kept on roof-top. (b) A running car. (c) Water stored in the reservoir of a dam. (d) A compressed spring. (e) A stretched rubber band.

Assertion :- When a rubber band is stretched entropy increases. Reason :- During expansion entropy increases.

As a rubber band is stretched, it gets warmer, when released, it gets cooler. The correct sign of thermodynamic parameters for stretching of rubber band is

Give reason : Stretching a rubber band is a physical change.

A rubber band stretches and reverts back to its original position. Bubble gum stretches but it would not return to its original position. Is there anydifference between the two processes ? Discuss it with respect to plant growth (hint elasticity (reversibel) plasticity (irresversible)

Entropy ( S ) is a thermodynamic variable like pressure P , volume V and temperature T . Entropy of a thermodynamic system is a measure of disorder of molecular motion. Greater is disorder , greater is entropy. Change in entropy of a thermodynamic system is the ratio of heat supplied to absolute temperature.In an adiabatic reversible process, entropy remains constant while in any irreversible process entropy increases. In nature the processes are irreversible , therefore entropy of universe is continuoulsy increasing. The unit of entropy in S-I system is -

Home
Profile