Question

Which of the following represents the absolute zero temperature?

• A. 0°C
• B. -100°C
• C. -273.15°C
• D. 100°C

Hint:

Absolute zero is the point at which molecular motion ceases, and it is equivalent to 0 Kelvin or -273.15°C.

Answer 1

The Correct Option is C

Absolute zero is the lowest possible temperature where the motion of atoms theoretically stops, and it is equal to -273.15°C.
This corresponds to 0 Kelvin (K).

Thus, the correct answer is -273.15°C.

Answer 2

Absolute zero is the theoretical temperature at which all molecular motion ceases.

Definition:
It represents the lowest possible temperature that can be reached, where the particles of a substance have minimum thermal energy.
At this temperature, entropy reaches its minimum value.

Value of Absolute Zero:
The value of absolute zero is precisely −273.15°C (or 0 Kelvin).
This is the point on the Celsius scale where the kinetic energy of particles is at its minimum.

Importance:
- Absolute zero is fundamental in thermodynamics and physics.
- It is the baseline for the Kelvin temperature scale.
- No real system has been observed to reach absolute zero, but scientists can approach it very closely.

Summary:
- Absolute zero temperature is −273.15°C.
- It corresponds to 0 Kelvin.
- It represents the point of zero molecular motion and minimum thermal energy.