The melting and boiling temperatures of what pure substance are used as standards in the main scales of temperature?
A) mercury
B) copper
C) water
D) oil
E) ice cream

Question

Quizplus · Accepted Answer

The melting and boiling temperatures of water at standard atmospheric pressure (1 atm) are widely used as standards in the main scales of temperature such as Celsius (°C) and Kelvin (K). The melting point of water is defined as 0 °C and its boiling point is defined as 100 °C at standard atmospheric pressure.

The Melting and Boiling Temperatures of What Pure Substance Are