1.3. METHODS OF EXPRESSING TEMPERATURES AND COMPOSITIONS
There are two temperature scales in common use in the chemical and biological industries. These are degrees Fahrenheit (abbreviated °F) and Celsius (°C). It is often necessary to convert from one scale to the other. Both use the freezing point and boiling point of water at 1 atmosphere pressure as base points. Often temperatures are expressed as absolute degrees K (SI standard) or degrees Rankine (°R) instead of °C or °F. Table 1.3-1 shows the equivalences of the four temperature scales.
|Boiling water||100°C||212°F||373.15 K||671.67°R||100°C|
|Melting ice||0°C||32°F||273.15 K||491.67°R||0°C|