Room Temperature Liquid Water
Water exists in three different states - solid, liquid, and gas. At room temperature, liquid water is present which is essential for sustaining life on Earth. Here is an explanation of why water is liquid at room temperature:

Intermolecular Forces
The reason water is a liquid at room temperature (around 20-25°C) is due to the intermolecular forces present in water molecules. Water molecules are polar, meaning they have a positive and negative end. This polarity allows water molecules to form hydrogen bonds with each other. These hydrogen bonds are weaker than covalent bonds but stronger than other intermolecular forces.

Hydrogen Bonding
The hydrogen bonding between water molecules is responsible for the unique properties of water, such as high surface tension, high specific heat capacity, and the ability to dissolve many substances. These hydrogen bonds also keep water molecules close together, allowing them to flow and take the shape of their container, which is characteristic of liquids.

Temperature Range
At temperatures above 0°C, water molecules have enough energy to overcome the intermolecular forces holding them together in a solid lattice. This results in the formation of a liquid where the molecules are still close together but can move past each other. As the temperature increases, the kinetic energy of the water molecules also increases, causing them to move more freely and eventually transition into a gas state at 100°C.
In conclusion, liquid water at room temperature is a result of the unique properties of water molecules, specifically the presence of hydrogen bonds that allow for fluidity and mobility of water molecules.