Question

When a solid is placed in a container and heat is applied, a phase change occurs.
___Temperature remains constant while all of a solid is converted to a liquid.
___When heat is applied to a solid, the molecular motion decreases as the temperature increases.
___The average kinetic energy of the system changes while all of a solid is converted to a liquid.
___The temperature increases while all of a liquid is converted to a gas.
___When a solid is converted to a liquid, heat is absorbed.
check all that apply

Answer 1

Concepts and reason

The change in energy during phase change or during a reaction is known as Enthalpy. When energy is absorbed during reaction or phase change the sign for enthalpy is taken as positive and when energy is released during reaction or phase change the sign for enthalpy is taken as negative.

In this question, a phase change has occurred and we must check the correct statements related to the phase change.

Fundamentals

The process in which a substance in solid state is converted into liquid state is termed as melting.

When heat is applied the solid changes into liquid. The energy provided to the solid is absorbed to overcome the interactions present between solid atoms.

The average kinetic energy does not change during the phase transformation.

Ans:

The correct statements are