Absolute Zero

---

Definition:

Absolute zero refers to the lowest possible temperature that can exist, which is equal to 0 Kelvin (K) or -273.15 degrees Celsius (°C). At absolute zero, all molecular and atomic motion ceases, and substances are at their minimum internal energy state.

---

Key Points:

• Absolute zero is the theoretical point of complete absence of heat energy.
• It is the temperature at which a substance contains minimal or no thermal energy.
• No natural process can lower the temperature of a system to exactly absolute zero.
• At absolute zero, all substances become solid, and gases and liquids condense into solid forms.
• Despite its unattainability, understanding absolute zero is crucial in various scientific fields such as thermodynamics and quantum physics.