Gas Laws And Mole Concept — Flashcards
Kerala Board · Class 10 · Chemistry
20 flashcards for Gas Laws And Mole Concept (Kerala Board Class 10 Chemistry) to test yourself on key terms and facts.
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What is Boyle's Law? State the mathematical relationship and its conditions.
Answer
Boyle's Law states that at constant temperature, the volume of a fixed mass of gas is inversely proportional to its pressure. Mathematical form: V ∝ 1/P or PV = k (constant) For two states: P₁V₁ = P₂…
A gas has volume 44 L at 1 atm pressure. What will be its volume at 4 atm pressure (temperature constant)?
Answer
Using Boyle's Law: P₁V₁ = P₂V₂ Given: P₁ = 1 atm, V₁ = 44 L P₂ = 4 atm, V₂ = ? Solution: 1 × 44 = 4 × V₂ V₂ = 44/4 = 11 L The volume decreases to 11 L when pressure increases to 4 atm.
What is Charles's Law? Explain with mathematical expression and absolute temperature.
Answer
Charles's Law states that at constant pressure, the volume of a definite mass of gas is directly proportional to its temperature in Kelvin scale. Mathematical form: V ∝ T or V/T = k (constant) For tw…
Calculate the volume of gas at 0°C if its volume is 150 L at 27°C (pressure constant).
Answer
Using Charles's Law: V₁/T₁ = V₂/T₂ Given: T₁ = 27°C = 27 + 273 = 300 K V₁ = 150 L T₂ = 0°C = 0 + 273 = 273 K V₂ = ? Solution: 150/300 = V₂/273 V₂ = (150 × 273)/300 = 136.5 L Volume decreases to 136…
State Avogadro's Law and explain its significance in understanding gas behavior.
Answer
Avogadro's Law: At constant temperature and pressure, equal volumes of all gases contain equal number of molecules. Mathematical form: V ∝ N (number of molecules) Key points: • Equal volumes = Equal…
What is the Combined Gas Equation? When is it used?
Answer
Combined Gas Equation combines Boyle's and Charles's laws: P₁V₁/T₁ = P₂V₂/T₂ Derived from: • V ∝ 1/P (Boyle's Law) • V ∝ T (Charles's Law) • Combined: V ∝ T/P • Therefore: PV/T = constant Used when…
List the main postulates of Kinetic Molecular Theory of gases.
Answer
Kinetic Molecular Theory postulates: 1. Gases consist of minute particles (atoms/molecules) 2. Attractive forces between gas molecules are negligible 3. Volume of gas molecules is negligible compared…
Define: Mole, Avogadro's Number, and their relationship.
Answer
Mole: The SI unit for quantity of matter. One mole contains 6.022 × 10²³ particles (atoms/molecules/ions). Avogadro's Number (Nₐ): 6.022 × 10²³ • Number of particles in one mole of any substance • Na…
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Sources & Official References
- Kerala Board of Public Examinations — keralapareekshabhavan.in
- National Education Policy 2020 — education.gov.in
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