Entropy of rubber band when stretched?

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Imelda Jacobson asked a question: Entropy of rubber band when stretched?
Asked By: Imelda Jacobson
Date created: Sat, Aug 14, 2021 2:09 PM
Date updated: Tue, Sep 6, 2022 8:08 AM

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Top best answers to the question «Entropy of rubber band when stretched»

When stretched the polymer strands should be more aligned and straighten out along the direction of the stretching. When you relax it the strands go in all directions, or become more disordered. For this change the entropy increases, which means the heat is positive.

FAQ

Those who are looking for an answer to the question «Entropy of rubber band when stretched?» often ask the following questions:

❓ A stretched rubber band contains what type of energy?

elastic potential energy

A stretched rubber band has the potential to do work or change things. This form of energy is called elastic potential energy. It occurs when an object (such as our skin, a spring, a trampoline, or a rubber band) resists being stretched out of shape. The elastic potential energy in a rubber band can be used to do work.

❓ Does holding a rubber band stretched get you tired?

When you do work, real work, you get tired. If you are smart, however, just exerting forces, shouldn't get you tired… If someone told you to hold a rubber band stretched for a day, you might get tired but not because you did any work.

❓ How did the rubber band acquire energy when stretched?

The energy acquired is called elastic potential energy. When we stretch the rubber bands kinetic energy is produced. When it is brought to rest after stretching then kinetic energy converts into potential energy.

❓ How fast does a stretched rubber band?

How does a rubber band travel so fast?

  • When you streeeeeetch a band, you STORE elastic energy in the band, so the more it is STRRRREEEECCCHHEDD, the more energy stored, and then when you let it go, the stored energy is transformed into KINETIC energy. Now, the kinetic energy is proportional to velocity squared, so the more stored energy, the fast and further the rubber band travels!

❓ How to calculate the velocity of a stretched rubber band?

  • This is equal to one half the mass (of the rubber band) multiplied by its velocity (in meters per second) squared. Using these equations, you can calculate the velocity of the rubber band right when it is released, and find that the velocity has a linear relationship with the stretch length.

❓ What force does a stretched rubber band have?

You input potential (stored) energy into the rubber band system when you stretched the rubber band back. Because it is an elastic system, this kind of potential energy is specifically called elastic potential energy.

❓ What happens to the entropy of a stretched rubber band?

  • When the tension is removed, the stretched rubber band spontaneously snaps back to its original shape; that is D G is negative and -D G is positive. The cooling effect means that it is an endothermic process (D H>0) so that TD S is positive. Thus the entropy of the rubber band increases when it goes from the stretched state to the natural state.

❓ What happens when a rubber band is stretched?

A rubber band is an elastic material in nature. When stretched, it changes its shape and when the applied force is removed, it regains its original shape. That is why a rubber band changes its shape even though it is a solid. Also, if excessive force is applied then the rubber band would break.

❓ What happens when rubber is stretched?

  • When stretched by external force, these spirally curved molecules will straighten and stretch; when the external force is removed, they will return to spiral bending due to the internal force. Shape, so that the rubber shows a strong elasticity.

Your Answer

We've handpicked 6 related questions for you, similar to «Entropy of rubber band when stretched?» so you can surely find the answer!

What will happen if you stretched a rubber band?

A rubber band is an elastic material in nature. When stretched, it changes its shape and when the applied force is removed, it regains its original shape. That is why a rubber band changes its shape even though it is a solid. Also, if excessive force is applied then the rubber band would break.

When a rubber band is stretched it has what energy?
  • You input potential (stored) energy into the rubber band system when you stretched the rubber band back. Because it is an elastic system, this kind of potential energy is specifically called elastic potential energy.
When does entropy increase in a stretched rubber band?
  • For changes, nature favors increases in entropy (ΔS > 0) that will maximize the number of different possible arrangements of particles and energy in the system. In this investigation, you will observe whether thermal energy is absorbed or released from a rubber band as it is stretched and allowed to contract.
Why does a rubber band become a lighter color when stretched?

Upon stretching, the coils unwind and reflect more uniformly, which gives it a shiny look. This answer and this answer elaborates this effect well. So, on stretching a rubber band, it becomes more reflective, which means more light would reach your eyes, giving a perception of a lighter colour.

Why does stretching a rubber band make it hot entropy?

When molecules, not just rubber molecules, but any molecules, form crystals, they give off heat. This is why the rubber band feels hot when its stretched. When you let go of the rubber band, the polymer molecules break out of those crystals. Whenever molecules break out of crystals, they absorb heat.

Why does the entropy of a rubber band decrease when stretched?
  • Because the rubber molecules are so long, each one participates in many crosslinks with many other rubber molecules forming a continuous molecular network. As a rubber band is stretched, some of the network chains are forced to become straight and this causes a decrease in their entropy.