Question

The absolute zero, i.e., temperature below which is not achievable. is about

_____________.

• A. $0^{o}C$
• B. $-273K$
• C. $-{273}^{o}C$
• D. $-{300}^{o}C$

Answer 1

The correct option is C $-{273}^{o}C$

Absolute zero is the lowest possible temperature where nothing could be colder and no heat energy remains in a substance. This corresponds to 0 K or -273°C. It is a temperature at which a thermodynamic system has the lowest energy.