How is temperature related to the physical change of a substance?

How is temperature related to the physical change of a substance?

Temperature is associated with the change in physical state due to its effect on the kinetic energy of particles.

Increasing temperature causes particles to acquire greater kinetic energy, moving and interacting with greater freedom, thus reducing the strength of intermolecular forces, resulting in a phase change like melting and vaporisation (solid-liquid, liquid-gas), etc.

Decreasing temperature reduces the kinetic energy of particles and causes them to move more slowly and closer to one another. Hence, intermolecular forces between particles increase, bringing about changes like condensation, freezing, etc. (gas-liquid, liquid-solid).

Specific temperatures are involved with changes in the state, like the melting and boiling points. During these changes in state, the temperature is held constant until the change is completed.

For instance, at the melting and boiling points of water under normal pressure, i.e., 0°C and 100°C, a state change will occur at constant temperature.

Need Help with Your Assignment?

If you’re struggling to complete your science assignments or want to achieve better grades, Locus Assignments is here to help. Get expert-written, plagiarism-free solutions tailored to your requirements, whether it’s essays, reports, or complex topics. Simply connect with professionals and get reliable assignment help UK to meet your deadlines with confidence.