The boiling point of a liquid substance is defined as the temperature where the vapor pressure of the liquid is equal to the external pressure on the liquid. The normal boiling point is the temperature at which the vapor pressure is equal to the standard sea-level atmospheric pressure (760 mm [29.92 inches] of mercury). It varies depending on the applied pressure on the liquid substance. There are two liquid substances whose boiling points fall under the range of sixty-three to sixty-five, the first one is 3 - Methylpentane which has 63.3-degree Celsius, and the second one is Alcohol - methyl (methyl alcohol, wood alcohol, wood naphtha or wood spirits) CH3OH which has a boiling point of 64.7-degree Celsius.
