Question

State four effects which heat energy can bring about in matter.

Answer 1

Heat energy produces a number of effects in a matter. These effects are listed below:

1. Heat energy brings about a change in temperature: When a material body (solid, liquid, or gas) is supplied with heat energy, its temperature rises.
2. Heat energy brings about change in dimensions: When a material body (solid, liquid, or gas) is supplied with heat energy, its dimensions change, i.e., on the absorption. of heat energy, the length, the area, and volume of the body increase.
3. Heat energy brings about chemical change: A large number of chemical reactions take place when the reactants are heated. e.g. calcium carbonate (marble) on strong heating changes into calcium oxide and carbon dioxide.
4. Heat energy brings about a change of state: The following diagram shows the changes in states.