Learning Outcomes Students will be able to: • discuss the properties of solids, liquids and gases. classify the matter into solid, liquid and gas. discuss the inter-conversion of one state of matter into another explain the effect of heat on matter showing change of state, expansion and chemica change.
Answers
Answer:
Water can take many forms. At low temperatures (below 0oC), it is a solid. When at "normal" temperatures (between 0oC and 100oC), it is a liquid. While at temperatures above 100oC
, water is a gas (steam). The state that water is in depends upon the temperature. Each state has its own unique set of physical properties. Matter typically exists in one of three states: solid, liquid, or gas.
: Matter is usually classified into three classical states, with plasma sometimes added as a fourth state. From left to right: quartz (solid), water (liquid), nitrogen dioxide (gas).
The state that a given substance exhibits is also a physical property. Some substances exist as gases at room temperature (oxygen and carbon dioxide), while others, like water and mercury metal, exist as liquids. Most metals exist as solids at room temperature. All substances can exist in any of these three states. A solid has definite volume and shape, a liquid has a definite volume but no definite shape, and a gas has neither a definite volume nor shape.
: A Representation of the Solid, Liquid, and Gas States. (a) Solid O2 has a fixed volume and shape, an
Explanation:
Inter conversion of matter refers to the change of one state to another. It is a process by which matter changes from one state to another and back to its original state, without any change in its chemical composition. Solid can be converted into liquids by heating. Similarly, liquids can be converted into gases by heating and gases can be converted into liquid and liquids can be converted into solids by cooling. The inter conversion of states is a physical change because these changes occur without a change in composition and no change in the chemical nature of the substance
(i) Solid to Liquid: Melting
(ii) Liquid to Gas: Evaporation
(iii) Gas to liquid: Condensation
(iv) Liquid to Solid: Freezing
(v) Solid to Gas: Sublimation
(vi) Gas to Solid: Deposition