Volume of a gas at STP is 10 dm3. At what temperature will its volume become 30dm3, keeping the pressure constant:
Correct answer: C. 819K
- A. 3°C
- B. 819°C
- C. 819K
- D. 3K
Explanation
Using Charles's Law (V₁/T₁ = V₂/T₂), with T₁ being STP (273 K). T₂ = T₁(V₂/V₁) = 273 K × (30 dm³ / 10 dm³) = 273 × 3 = 819 K.
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Gas behaviour is explained through the kinetic molecular theory and the relationships among pressure, volume and temperature. Work includes STP, Boyle's and Charles's laws, absolute zero, the ideal gas equation, and the distinction between ideal and real gases, especially the effects of intermolecular forces and molecular volume.
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