When a solid is heated, which of the following changes occur?
Correct answer: C. The molecule vibrates more rapidly
- A. The density increases
- B. The latent heat increases
- C. The molecule vibrates more rapidly
- D. The melting point increases
Explanation
The changes that take place when a solid is heated (increase in temperature) are as follows:On increasing the temperature of solids, the Kinetic Energy (K.E.) of particles increases.Due to an increase in Kinetic Energy(K.E.), the particles start vibrating with greater speed.The energy supplied by heat overcomes the force of attraction between the particles.Then, the particles leave their fixed positions and start moving freely, and thus solid melts.Thus melting of solids takes place.Melting or Fusion: The process due to which a solid change into a liquid state by absorbing heat energy is called melting or fusion.
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About Thermal Equilibrium and Heat
Thermal equilibrium means that bodies in contact have the same temperature and no net heat flows between them. The topic distinguishes heat from temperature, uses the zeroth law of thermodynamics, and covers heat transfer, specific heat capacity, thermal expansion and the conditions for reaching equilibrium.
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