Table of Contents
Answer
To address how energy is related to the change of state, we need to understand the concept of phase changes and the energy involved in these processes.
- Define phase changes.
Phase changes refer to the transitions between different states of matter, such as solid, liquid, and gas. Common phase changes include melting (solid to liquid), freezing (liquid to solid), evaporation (liquid to gas), and condensation (gas to liquid) - Explain energy changes during phase changes.
During a phase change, energy is either absorbed or released. For instance, when a solid melts into a liquid, it absorbs energy in the form of heat, which is called latent heat of fusion. Conversely, when a liquid freezes, it releases energy, known as the latent heat of solidification. Similarly, when a liquid evaporates, it absorbs energy (latent heat of vaporization), and when a gas condenses, it releases energy. - Illustrate the energy relationship with a model.
In a graphical model, the energy level of a substance can be represented on the y-axis, while temperature can be represented on the x-axis. During a phase change, the temperature remains constant while the energy increases or decreases, indicating that energy is being used to change the state rather than increase the temperature.
In summary, energy is crucial in facilitating the change of state by either being absorbed or released, which allows substances to transition between solid, liquid, and gas forms.
The answer is: Energy is absorbed or released during phase changes, facilitating transitions between solid, liquid, and gas states.