Question

Name the state of matter that changes to gaseous state on heating.

Answer 1

Change in state of matter due to increasing heat

• Heating the matter increases the energy of particles whereas cooling the matter decreases the energy of particles.
• This change in energy brings a change in the state of matter.
• Solids change into liquids, and liquids into gases when particles of matter gain more kinetic energy.
• When a solid is heated, its temperature increases.
• Its particles gain kinetic energy from heat and start vibrating faster. This continues till the matter reaches its melting point.
• It is a point when the further increase in heat does not increase the temperature.
• If heat is continued at the melting point, a stage comes the force of attraction between them is overcome and the particles start moving away from their fixed positions, thus changing from solid to the liquid state.
• On further heating, the particles keep gaining more kinetic energy and move faster till the temperature reaches the boiling point.
• If heat is continued beyond the boiling point, the kinetic energy of the particles becomes so large that they overcome the inter-particle force of attraction and break away and move out into the space available, thus changing liquid states into a gaseous state.

ie, The liquid state of matter that changes to a gaseous state on heating.