Question

Why do some materials shrink with increasing temperature?

a) Increased cohesive forces.
b) Increased kinetic energy.
c) Increased molecular motion.
d) Increased intermolecular forces.

Answer 1

When the temperature of a material increases, the kinetic energy of its particles also increases, causing them to move faster and disrupt the cohesive forces between them, resulting in shrinkage.

Step-by-step explanation:

When the temperature of a material increases, the kinetic energy of its particles also increases. This increased kinetic energy causes the particles to move faster and with greater vibration. The increased motion of the particles disrupts the cohesive forces between them, resulting in a decrease in the size or volume of the material, also known as shrinkage.

For example, when a metal is heated, the atoms within it gain kinetic energy and vibrate more vigorously. This disturbs the ordered arrangement of the atoms, causing them to move apart and leading to a decrease in size.