Solid air fresheners can shrink due to evaporation of the active ingredients that give off the scent. As the air freshener releases its fragrance into the air, the solid material diminishes in size. External factors such as temperature and airflow can also contribute to the shrinkage of solid air fresheners.
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The phase change that occurs when air freshener is sprayed is from liquid to gas. The air freshener is in liquid form inside the container, but when it is sprayed, it is released into the air as a gas or aerosol.
When you open a solid air freshner, the solid slowly loses mass and volume due to sublimation. Sublimation occurs when the surface particles of a solid gain enough energy to form a gas. Since solids are closely packed together and have a definite shape and volume and gases have no definite volume, when the solid air freshner sublimates, it causes the solid to lose shape and volume to turn into gas.
An air freshener is a mixture of many chemical substances, so there is no definitive chemical structure for an air freshener.
If you swallow plug-in air freshener liquid, seek medical attention immediately. Call Poison Control for advice on next steps and don't induce vomiting unless instructed to do so. Keep the container of the air freshener with you for reference.
A bow freshener is a product designed to eliminate odors and keep the air inside a vehicle or room smelling fresh. It typically comes in the form of a scented sachet or hanging air freshener that can be placed under a car seat or in a closet.