💨2 Effect of Pressure on Solubility of Gases in Liquids

 Absolutely, Mayank! Here's a simplified, impactful, and CBSE Class 12 board exam–oriented explanation of the Effect of Pressure on Solubility of Gases in Liquids, perfectly structured for classroom presentation or revision slides:

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💨 Effect of Pressure on Solubility of Gases in Liquids

📚 CBSE Class 12 | Easy | Exam-Focused

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✅ Key Idea:

The solubility of a gas in a liquid increases with an increase in pressure.

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🧪 Why Does This Happen? (Simple Explanation)

• Gases are compressible.

• When pressure increases, more gas particles are forced into the liquid.

• This increases the rate of gas molecules entering the solution.

• Eventually, a new dynamic equilibrium is reached — with more gas dissolved.

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⚖️ Dynamic Equilibrium:

$$\text{Gas (above liquid)} \rightleftharpoons \text{Gas (dissolved in liquid)}$$

📌 At high pressure: More gas moves into the liquid
📌 At low pressure: More gas escapes out of the liquid

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🧠 Henry’s Law (Very Important for Boards)

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

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🧮 Henry’s Law Formula:

$$p = K_H \cdot x$$

Where:

• p = partial pressure of gas

• x = mole fraction of gas in solution

• KH = Henry’s constant (depends on gas & temperature)

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📌 Important Points to Remember:

Condition	Effect on Solubility
↑ Pressure	↑ Solubility
↑ Temperature	↓ Solubility
↑ KH value	↓ Solubility

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🔍 Why KH Matters?

• Each gas has a different KH value.

• Higher KH means the gas is less soluble.

• Example from data:

  • CO₂ has low KH → dissolves easily (used in soda)

  • He has high KH → very low solubility

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📘 Applications of Henry’s Law (CBSE Must-Know)

Application	Explanation
Soda/Soft Drinks	CO₂ is dissolved under high pressure
Scuba Diving	High pressure dissolves N₂ in blood; sudden pressure drop → nitrogen bubbles → bends
High Altitudes	Low O₂ pressure → less oxygen dissolves in blood → anoxia (weakness, dizziness)

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📝 CBSE Exam Tips:

✅ Define Henry’s Law clearly
✅ Write the formula p = K_H × x
✅ Give 2 real-life examples
✅ Mention pressure increases solubility

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Would you like this as:

• 📊 A PowerPoint slide deck

• 📄 A PDF handout for students

• 🧠 Or a chalkboard-style summary image?

I can make any of these formats for your next class!Absolutely, Mayank! Here's a simplified, impactful, and CBSE Class 12 board exam–oriented explanation of the Effect of Pressure on Solubility of Gases in Liquids, perfectly structured for classroom presentation or revision slides:

---

💨 Effect of Pressure on Solubility of Gases in Liquids

📚 CBSE Class 12 | Easy | Exam-Focused

---

✅ Key Idea:

The solubility of a gas in a liquid increases with an increase in pressure.

---

🧪 Why Does This Happen? (Simple Explanation)

• Gases are compressible.

• When pressure increases, more gas particles are forced into the liquid.

• This increases the rate of gas molecules entering the solution.

• Eventually, a new dynamic equilibrium is reached — with more gas dissolved.

---

⚖️ Dynamic Equilibrium:

$$\text{Gas (above liquid)} \rightleftharpoons \text{Gas (dissolved in liquid)}$$

📌 At high pressure: More gas moves into the liquid
📌 At low pressure: More gas escapes out of the liquid

---

🧠 Henry’s Law (Very Important for Boards)

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

---

🧮 Henry’s Law Formula:

$$p = K_H \cdot x$$

Where:

• p = partial pressure of gas

• x = mole fraction of gas in solution

• KH = Henry’s constant (depends on gas & temperature)

---

📌 Important Points to Remember:

Condition	Effect on Solubility
↑ Pressure	↑ Solubility
↑ Temperature	↓ Solubility
↑ KH value	↓ Solubility

---

🔍 Why KH Matters?

• Each gas has a different KH value.

• Higher KH means the gas is less soluble.

• Example from data:

  • CO₂ has low KH → dissolves easily (used in soda)

  • He has high KH → very low solubility

---

📘 Applications of Henry’s Law (CBSE Must-Know)

Application	Explanation
Soda/Soft Drinks	CO₂ is dissolved under high pressure
Scuba Diving	High pressure dissolves N₂ in blood; sudden pressure drop → nitrogen bubbles → bends
High Altitudes	Low O₂ pressure → less oxygen dissolves in blood → anoxia (weakness, dizziness)

---

📝 CBSE Exam Tips:

✅ Define Henry’s Law clearly
✅ Write the formula p = K_H × x
✅ Give 2 real-life examples
✅ Mention pressure increases solubility

---

Would you like this as:

• 📊 A PowerPoint slide deck

• 📄 A PDF handout for students

• 🧠 Or a chalkboard-style summary image?

I can make any of these formats for your next class!