If a graph is plotted between temperature on x-axis and volume on y-axis for 1 mole of gas then we get straight line which cuts the temperature exis at________________?
Correct answer: D. ?273.16?C
- A. 0?C
- B. 273.16K
- C. ?273.16 K
- D. ?273.16?C
Explanation
Charles's law gives V proportional to absolute temperature, so extrapolating a volume-temperature graph to zero volume gives T = 0 K = -273.15 degrees C, approximately -273.16 degrees C. The likely mistake is choosing 273.16 K or 0 degrees C by confusing the Kelvin zero point with the Celsius zero point. The displayed option d appears to intend -273.16 degrees C.
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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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