Volume of a gas at STP is 10 dm3 . At what temperature its volume will become 30dm3, keeping the pressure constant:
Correct answer: C. 819K
- A. 3°C
- B. 819°C
- C. 819K
- D. 3K
Explanation
The volume of a gas at STP is 10 dm3. If the pressure is kept constant, the volume of the gas will increase as the temperature increases. The relationship between volume and temperature is given by the Charles' law.
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About Charles's Law
At constant pressure, the volume of a fixed mass of gas is directly proportional to its absolute temperature. Questions involve the Kelvin scale, the equation V₁/T₁ = V₂/T₂, volume-temperature graphs, and the need to distinguish Charles's law from Boyle's law, which relates pressure and volume.
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