The Uses and Dangers of Aerosol Spray

Aerosol sprays are systems that dispense a mist of liquid particles. They consist of a can, valve, and actuator. Historically, aerosols were developed in the late 18th century, with the first patent in 1927. CFCs, once used as propellants, were found to harm the ozone layer, leading to global warming. Alternatives like hydrocarbons, nitrous oxide, and carbon dioxide are now used, though some are flammable. Medicinal aerosols use hydrofluoric alkanes, and manual pumps are alternatives. Safety concerns include intoxication, burns, and flammability, necessitating careful handling.

What is the primary function of an aerosol spray?

• To release a stream of gas

• To produce a continuous liquid flow

• To dispense a mist of liquid particles

• To create a solid block of particles

Which chemical was historically used as a propellant in aerosol sprays but is now avoided due to environmental concerns?

• Nitrous oxide

• Propane

• Butane

• Chlorofluorocarbon (CFC)

What is a common disadvantage of using hydrocarbons as propellants in aerosol sprays?

• They are flammable

• They are environmentally friendly

• They are expensive

• They are non-flammable

Which component of an aerosol spray is responsible for opening and closing the valve?

• The nozzle

• The propellant

• The can

• The actuator

What safety concern is associated with aerosol sprays?

• They are non-toxic

• They can cause intoxication if inhaled

• They are safe to spray directly onto the skin

• They are non-flammable