Gases
Gases are one of the primary states of matter characterized by:
No Fixed Shape or Volume: Gases expand to fill the shape and volume of their container.
Particle Movement: Gas particles move rapidly and freely, with high kinetic energy and low intermolecular forces.
Compressibility: Gases can be compressed significantly because of the large spaces between particles.
Examples: Oxygen (O₂), nitrogen (N₂), carbon dioxide (CO₂).
Aerosols – Inhalers
Aerosols are suspensions of fine solid particles or liquid droplets in a gas. Inhalers are medical devices that deliver medication directly to the lungs in aerosol form.
Types of Inhalers:
Metered Dose Inhalers (MDIs):
Pressurized canisters that release a specific amount of medication as an aerosol.
Often used with a spacer to improve delivery to the lungs.
Dry Powder Inhalers (DPIs):
Deliver medication in powder form without a propellant.
Require the user to inhale quickly to disperse the powder into the lungs.
Applications:
Asthma: Medications like bronchodilators and corticosteroids to reduce inflammation and open airways.
Chronic Obstructive Pulmonary Disease (COPD): Similar medications to manage symptoms and improve breathing.