TEMPERATURE SCALES
 

PHENOMENON	T[°F]	T[°C]	T[K]
Absolute Zero	-459	-273	0
Water Freezes/Melts	32	0	273
Average Healthy Body Temperature	98.6	37	310
Comfortable Room	68	20	293
Water Boils/Condenses (Standard P)	212	100	373

Note:     T [K] = T [°C] + 273 K = (5/9)T [°F] + 255.22,
             T [°C] = T [K] - 273° = (5/9)[T [°F] - 32°],
             T [°F] = 1.8 T [°C] + 32° = 1.8 T [K] − 459.4° ,
             ΔT[K] = ΔT [°C] = (5/9)ΔT [°F].
 

If temperature is expressed in Kelvins, then the internal energy of a system, U, is simply proportional to temperature, i.e.,

U = constant T [K],

otherwise, for other temperature scales,
 

U = constant₁ T + constant₂.