✅ Applications of Henry’s Law

 Here’s a clear, CBSE Class 12 board exam–friendly list of the most important applications of Henry’s Law (based on Henry’s Law constant, 

KHK_H) — ideal for classroom teaching, revision, or slides.

✅ Applications of Henry’s Law

📚 Class 12 Chemistry – Important for Boards

📘 1. Bottling of Soft Drinks and Soda Water

  • CO₂ gas is dissolved in soft drinks under high pressure.

  • High pressure increases CO₂ solubility (as per Henry’s Law).

  • When the bottle is opened, pressure drops → CO₂ escapes as fizz.

🧪 Formula involved:

p=KH⋅xp = K_H \cdot x

⬆️ p ⇒ ⬆️ x (solubility)

🤿 2. Scuba Diving – Prevention of Bends

  • Underwater, divers breathe air under high pressure.

  • N₂ gas dissolves more in blood at high pressure.

  • If a diver comes up too fast, pressure drops suddenly → N₂ forms bubbles in blood.

  • This causes bends (joint pain, blocked vessels).

  • To avoid this, divers use a helium–oxygen mixture (He is less soluble).

🧠 Based on:
KH of He > KH of N₂, so He dissolves less in blood.

⛰️ 3. High Altitude – Anoxia

  • At high altitudes, oxygen pressure is low.

  • According to Henry’s Law, less oxygen dissolves in blood.

  • This causes anoxia – symptoms: weakness, dizziness, confusion.

📌 Happens to mountain climbers, pilots, or people in unpressurized aircraft.

🧬 4. Breathing in Medical Oxygen (Hyperbaric Oxygen Therapy)

  • Patients with carbon monoxide (CO) poisoning are given oxygen at high pressure.

  • This increases O₂ solubility in blood, helping displace CO from hemoglobin.

🏭 5. Industrial Use – Removal of Dissolved Gases

  • In processes like steel production, dissolved oxygen and nitrogen must be removed.

  • Lowering pressure reduces gas solubility (based on Henry’s Law), helping to remove gases from molten metal.

📝 Board Exam Tip:

  • Always write 2–3 applications

  • Use keywords: pressure, solubility, bends, anoxia, soft drinks

  • If time permits, write the formula p=KH⋅xp = K_H \cdot x

Would you like a summary slide, flashcards, or a classroom wall chart with these applications?

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