Raoult's law: vapour pressure vs composition (ideal solution)राउल्ट का नियम: वाष्प दाब बनाम संघटन (आदर्श विलयन)Raoult's law: vapour pressure vs composition (ideal solution)
NCERT Fig 1.3 · Class 12 Chemistry · Chapter 1 · interactive diagram
Parts and what they mean
- Line I — partial pressure p₁ (रेखा I — आंशिक दाब p₁) — p₁ = x₁·p₁⁰. Falls from p₁⁰ (pure 1, x₁ = 1) to zero (x₁ = 0).
- Line II — partial pressure p₂ (रेखा II — आंशिक दाब p₂) — p₂ = x₂·p₂⁰. Rises from zero to p₂⁰ (pure 2).
- Line III — total vapour pressure (रेखा III — कुल वाष्प दाब) — p total = p₁ + p₂ = p₁⁰ + (p₂⁰ − p₁⁰)x₂ — a straight line between p₁⁰ and p₂⁰ (Dalton’s law + Raoult’s law).
- Composition axis (संघटन अक्ष) — Left end = pure component 1; right end = pure component 2. Temperature is constant.
Original diagram drawn by Simple Learning Hub, based on NCERT Fig 1.3. Report a mistake