Heat is absorbed by a body but its temperature does not rise. Which of the following statements explains the phenomena?

No increase in internal energy takes place

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Only kinetic energy of vibration increases

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Increase in kinetic energy in balanced by decrease in potential energy

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Only potential energy of intermolecular force field increases

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Solution

The correct option is D Only potential energy of intermolecular force field increases
Heat is absorbed with rise in temperature when change of state is taking place. The configuration of molecules and therefore, the potential energy of the molecules of there is different in two different states say solid and liquid or liquid and gas etc. The heat absorbed goes to compensate this molecular potential energy.

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Similar questions

Which of the following statements is correct about a freely falling body?

1. Total energy is constant.
2. Potential energy changes into kinetic energy.
3. Potential energy decreases.
4. Kinetic energy increases.

Q. Statement I
As ice absorbs heat and begins to melt, its temperature remains constant
Because
Statement II
Changes of state bring about changes in a substances potential energy, not in its kinetic energy

Which of the following statement(s) is/are true about a freely falling body?

1. Total energy is constant.

2. Potential energy changes to kinetic energy.

3. Potential energy decreases.

4. Kinetic energy increases.

Underline the correct alternative :

(a) When a conservative force does positive work on a body, the potential energy of the body increases / decreases / remains unaltered.

(b) Work done by a body against friction always results in a loss of its kinetic / potential energy.

(c) The rate of change of total momentum of a many-particle system is proportional to the external force / sum of the internal forces on the system.

(d) In an inelastic collision of two bodies, the quantities which do not change after the collision are the total kinetic energy / total linear momentum / total energy of the system of two bodies.

Q. Assertion :If work done by conservative forces is positive, kinetic energy will increase. Reason: Here potential energy will decrease.

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