Moderate

A graph between volume and temperature gives a straight line which cuts the temperature axis at:

Correct answer: D. -273 oC

  • A. 0 oC
  • B. 273 oC
  • C. 546 oC
  • D. -273 oC

Explanation

The graph of temperature with volume should be a straight line passing through the origin (0,0), given the temperature is measured in Kelvins. Since all the options are given in degrees Celsius 0 K should be converted as well, which gives us -273 oC.

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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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