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Does heat of vaporization increase with intermolecular forces?

The stronger the intermolecular forces, the higher the heat of fusion. What happens to the heat of vaporization as the intermolecular forces increase? The stronger the intermolecular forces, the higher the heat of vaporization. The stronger the intermolecular forces, the lower the vapor pressure.

What must happen for a pure liquid to reach its boiling point?

The boiling point of a liquid depends on temperature, atmospheric pressure, and the vapor pressure of the liquid. When the atmospheric pressure is equal to the vapor pressure of the liquid, boiling will begin.

Is methanol more volatile than water?

The volatility of a liquid can be assessed by considering its boiling point. Ethanol, b.p. 79ºC is more volatile than water, b.p.100ºC, whereas methanol, b.p. 56ºC, is more volatile than ethanol. Temperature. The temperature is a measure of the average kinetic energy of the particles in a system.

How is methanol volatile?

Methanol appears as a colorless fairly volatile liquid with a faintly sweet pungent odor like that of ethyl alcohol. Completely mixes with water. The vapors are slightly heavier than air and may travel some distance to a source of ignition and flash back.

What is the range of Vapour pressure of Vocs?

The VOC-directive defines a volatile organic compound as an organic compound having at 293.15 K a vapour pressure of 0.01 kPa or more, or having a corresponding volatility under the particular condition of use [1].


The US EPA publishes a list of exempt chemicals, and many states publish their own list of exempt chemicals (e.g. California through CARB). For example, isopropyl alcohol (IPA) is not exempt by EPA (and most if not all other) standards, so 99% pure IPA has a VOC of 99%.

How do VOCs are regulated?

The U.S. EPA regulates VOCs at Federal level in 40 CFR 59, which is the National Volatile Organic Compound Emission Standards For Consumer And Commercial Products. VOC controls for products are typically based on the application of products, such as: Aerosol Coatings. Automobile Refinish Coatings

Is rubbing alcohol a VOC?

Not the type you drink, but rather the one used in the home for cleaning and disinfecting, this particular VOC is usually referred to as isopropyl alcohol. It’s prone to photochemical reactions, meaning it evaporates quickly at room temperature and is commonly found in high concentrations.

What are some examples of VOCs?

Common examples of VOCs that may be present in our daily lives are: benzene, ethylene glycol, formaldehyde, methylene chloride, tetrachloroethylene, toluene, xylene, and 1,3-butadiene.