Energy Absorbed During Phase Change
The specific term for energy absorbed or released during a phase transition (change of state) occurring at a constant temperature is latent heat.
Defining Latent Heat
When a substance changes its state, for example, from solid to liquid (melting) or liquid to gas (boiling), the energy it absorbs or releases is used to break or form intermolecular bonds, rather than increasing the substance's temperature.
- Latent Heat: This is the heat energy absorbed or released per unit mass during a change of state at a constant temperature and pressure.
- Kinetic Energy: This relates to the energy of motion of particles. It's a component of internal energy but not the term for the absorbed heat during a phase change.
- Thermal Energy: This is the total internal energy of a system related to temperature. It increases when temperature rises, but during a phase change, it remains constant.
- Specific Heat: This is the heat required to raise the temperature of a unit mass of a substance by one degree. It applies when temperature changes, not during a phase change at constant temperature.
Therefore, the energy absorbed during a change of state at constant temperature is correctly identified as latent heat.
Important Questions from Physics
Two balls, A and B, are thrown simultaneously, a vertically upward with a speed of 20 m/s from the ground and B vertically downward from a height of 40 m with the same speed and along the same line of motion. At what points do the two balls collide by taking acceleration due to gravity as 9.8 m/s 2?
On the basis of which principle does soap clean surfaces?
Which one of the following devices is used to measure atmospheric pressure?
Which one of the following energy is stored in the links between the atoms?
Who among the following has explained the phenomenon of photoelectric effect?
