Solid: If the room temperature is lower than the melting point of the substance, it will be in a solid state.
Liquid: If the room temperature is between the melting point and the boiling point of the substance, it will be in a liquid state.
Gas: If the room temperature is higher than the boiling point of the substance, it will be in a gaseous state.
For example, at room temperature (around 25°C):
* Water is a liquid because its melting point (0°C) is lower than room temperature, and its boiling point (100°C) is higher than room temperature.
* Iron is a solid because its melting point (1538°C) is much higher than room temperature.
* Oxygen is a gas because its boiling point (-183°C) is much lower than room temperature.
This knowledge helps in understanding and predicting the physical behavior of substances at different temperatures and pressures.
