Which of the following is known as absolute zero?
Correct answer: D. -273.16C°
- A. 0C°
- B. 273K
- C. 273.16C°
- D. -273.16C°
Explanation
Absolute zero is the lowest theoretical temperature, equal to 0 K and approximately -273.15 °C; many older chemistry texts state it as -273.16 °C. Students may choose 273 K by forgetting that absolute zero is 0 K, not ordinary positive 273 K.
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About Absolute Zero
Absolute zero is 0 K, equal to −273.15°C, the lowest theoretical temperature on the Kelvin scale. The topic covers the relationship between temperature and molecular motion, the extrapolation of gas volume or pressure to zero, and why absolute zero cannot be reached experimentally, although particles retain quantum zero-point energy.
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