| − | The temperature at which a specific substance [[boiling|boils]]. This occurs when the [[Vapor Pressure]] is equal to the atmospheric pressure. At sea level, the atmospheric pressure on Earth equals 1 atm (760 mm Hg). | + | The temperature at which a specific substance [[boiling|boils]]. This occurs when the [[Vapor Pressure]] is equal to the atmospheric pressure. At sea level, the atmospheric pressure on Earth equals 1.00 atm (760 mm Hg). |