what is its role as a reference of a compoud?
The normal boiling point can serve as an indication of that compound's overall volatility
Boiling point
As can be seen from the above plot of the logarithm of the vapor pressure vs. the temperature for any given pure chemical compound, its normal boiling point can serve as an indication of that compound's overall volatility
mercury is good or bad conductor of heat Bad conductor of heat what is this bad conductor? It is a chemical element with the symbol Hg and atomic number 80 what are its physical characteristics? It  is a heavy, silvery-white liquid metal, it has a freezing point of −38.83 °C and a boiling point of 356.73 °C, upon freezing, the volume of mercury decreases by 3.59% and its density changes from 13.69 g/cm when liquid to 14.184 g/cm when solid, solid mercury is malleable and ductile and can be cut with a knife. what is this aforesaid point mentioned? The boiling point of a substance is the temperature at which the vapor pressure of a liquid equals the pressure surrounding the liquid and the liquid changes into a vapor
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Boiling point [SEP] Boiling point as a reference property of a pure compound
As can be seen from the above plot of the logarithm of the vapor pressure vs. the temperature for any given pure chemical compound, its normal boiling point can serve as an indication of that compound's overall volatility. A given pure compound has only one normal boiling point, if any, and a compound's normal boiling point and melting point can serve as characteristic physical properties for that compound, listed in reference books. The higher a compound's normal boiling point, the less volatile that compound is overall, and conversely, the lower a compound's normal boiling point, the more volatile that compound is overall.