What are the physical and chemical properties of Water? (H20)

                                                      These are the properties of a substance which can be observed without changing the physical appearance of a substance.

          Example :

                            (i) Boiling Point: Water has a boiling point of 100 °C at sea level. At this temperature the water changes its state from liquid to vapors (gas).

                            (ii) Melting Point: Water has a melting point of 0 °C. At this temperature the water changes its state from solid to liquid.

                            (iii) Freezing Point: Water has a melting point of 0 °C. At this temperature the water changes its state from liquid to solid.

                            (iv) Density: The density of water is about 1 g/ml at 20 °C.

                            (iii) Heat Capacity: Heat capacity of water is 4.186 joule/gram °C.

                                                      These are the properties of a substance which can be observed only by changing the identity of a substance.

          Example :

                            (i) Stable Compound: Water is said to be a very stable compound. It means it cannot decompose easily. Hence, has a stable bonds. This stability can be termed as chemical property.

                            (ii) Reactions with Metals: With reaction with metals the water produces hydrogen gas and corresponding metal hydroxide.

                            (iii) Reactions with Metal Oxides: Upon reaction with metal oxides water produces bases.

                            (iv) Reactions with Non-Metals: Upon reaction with non-metals water produces corresponding acids.

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