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Asked in NUMS 2019 (cancelled sitting) 2019

Absolute zero is equivalent to:

Correct answer: D. All of these

  • A. 0K
  • B. -273.15 C
  • C. -459.4 F
  • D. All of these

Explanation

Absolute zero is one temperature written on three scales: 0 K, -273.15 C and about -459.67 F. Each describes the point at which molecular kinetic energy reaches its minimum, so all of these are correct.

This question appeared on the NUMS 2019 (cancelled sitting) paper, which you can sit online with every answer explained.

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About Thermodynamics

Thermal equilibrium and heat explain how temperature and energy transfer are related, while molar specific heats describe the heat required by a gas at constant volume or constant pressure. The first law connects heat supplied, work done and change in internal energy, with sign conventions kept distinct from temperature changes.

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