1. Physical Properties:
- Oxygen (O2):
- Colorless and odorless gas.
- Slightly soluble in water.
- Reacts with many elements and compounds.
- Hydrogen (H2):
- Colorless and odorless gas.
- Highly flammable.
- Low solubility in water.
- Lowest boiling point of all elements.
- Water (H2O):
- Colorless and odorless liquid (at room temperature).
- High surface tension and specific heat capacity.
- Excellent solvent for many substances.
- High boiling point compared to its constituent elements.
2. Chemical Properties:
- Oxygen (O2):
- Highly reactive and supports combustion.
- Forms oxides with most elements.
- Essential for cellular respiration in organisms.
- Hydrogen (H2):
- Highly flammable and burns in the presence of oxygen.
- Forms covalent bonds with many elements.
- Produces water when combined with oxygen.
- Water (H2O):
- Polar molecule with hydrogen bonds.
- Exhibits high cohesion and adhesion forces.
- Undergoes various chemical reactions, including hydration, hydrolysis, and acid-base reactions.
- Acts as a universal solvent for numerous polar and ionic compounds.
In summary, oxygen and hydrogen are both gases with unique properties, while water, formed by their chemical combination, exhibits distinct physical and chemical characteristics, including its liquid state, high surface tension, and diverse solvent properties.
