applications of henery Law

 Here is a CBSE Class 12–friendly, clear and concise explanation of the applications of Henry’s Law, based on the paragraph you shared. This is ideal for classroom teaching, presentations, and exam preparation.

⚗️ Applications of Henry’s Law

Henry’s Law states that:

At constant temperature, the solubility of a gas in a liquid is directly proportional to the partial pressure of the gas above the liquid.

This principle has important industrial and biological applications:

✅ 1. Soft Drinks and Soda Bottles

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

  • This increases its solubility in the liquid.

  • When the bottle is opened, pressure decreases and CO₂ escapes, forming bubbles.

🧃 Real-life example: Fizz in Coca-Cola or soda water.

✅ 2. Scuba Diving and Bends (Decompression Sickness)

  • Underwater, divers breathe compressed air at high pressure.

  • Gases like N₂ and O₂ dissolve more in the blood.

  • When divers rise quickly, pressure drops suddenly, and N₂ gas forms bubbles in blood.

  • These bubbles block capillaries, causing "bends" — a painful and dangerous condition.

🛡️ Prevention:

  • Scuba tanks are filled with a helium-oxygen mixture (not pure nitrogen).

  • Helium is less soluble and less toxic than nitrogen.

✅ 3. High Altitude and Anoxia

  • At high altitudes, partial pressure of oxygen is low.

  • So, less oxygen dissolves in blood.

  • This causes a condition called anoxia:

    • Weakness

    • Dizziness

    • Difficulty in thinking clearly

⛰️ Seen in: Mountain climbers, passengers in unpressurized aircraft.

📌 Summary Table:

Application Based on Henry’s Law Effect
Soft drinks High pressure More CO₂ dissolves
Scuba diving High pressure More gases dissolve; sudden rise = bends
High altitudes Low pressure Less O₂ in blood → anoxia

📝 CBSE Exam Tip:

  • Always write at least two applications with keywords:

    • High pressure → more gas dissolves

    • Bends, anoxia, helium tanks, soft drink fizz

Would you like this as a PowerPoint slide, PDF handout, or a summary chart for display in class?

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