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WAEC Physics 2018 Paper

Question : 15

Total: 50

The ice point on the absolute scale of temperature is

Solution:

Concept:

The ice point is the freezing point of pure water, which is

0^\circ C

on the Celsius scale.

Explanation:

The absolute (Kelvin) scale is related to the Celsius scale by the equation:

T(K) = t(^\circ C) + 273.15

At the ice point,

t = 0^\circ C

Substituting into the equation gives:

T = 0 + 273.15 = 273.15\,K

Hence, the ice point is approximately

273\,K

0\,K

is absolute zero, not the ice point.

Answer:

273\,K

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