The heat of vaporization is the amount of energy that is required to convert a substance from liquid to gaseous state without changing its temperature. A substance with a high heat of evaporation takes longer to transform between the two states.
The heat of evaporation is mainly dependent on the strength of intermolecular bonds. Substances with strong intermolecular bonds are more likely to have high heat of evaporation than those with weaker ones. When a substance reaches its boiling point, its temperature stagnates until all the substance is converted to a gas. All the heat energy exerted on the substance is used for breaking the intermolecular bonds. This is where the relationship between the heat of evaporation and intermolecular bond strength arises.Learn More
Oxygen exists in a gaseous state at room temperature. With a boiling point of minus 297 degrees Fahrenheit, oxygen exists in its gaseous state on Earth almost all of the time unless it is deliberately liquefied.Full Answer >
A liquid is a substance that has a constant volume but no permanent shape. As an adjective, it can be used to describe something with a smooth, flowing consistency.Full Answer >
The enthalpy of vaporization is the energy, in the form of heat, that a substance needs to change from a liquid to a gas at a constant temperature and pressure. Enthalpy of vaporization, designated as "delta H vap," is measured in kilojoules per mole of substance. The amount of heat needed to change 2.2 pounds of water into steam is 2,257 kilojoules, or 2,2257 kJ/mol.Full Answer >
Water is a liquid at room temperature because the hydrogen bonds within its construction are weak. These weak bonds hold water molecules together for mere milliseconds, which keeps water in a constantly liquid state at room temperature.Full Answer >