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Charles's law states that, at constant pressure, the volume of a gas is related to its temperature in which way?
AVolume is directly proportional to temperature
BVolume is proportional to the square of temperature
CVolume is inversely proportional to temperature
DVolume is independent of temperature
Answer & Solution
Correct answer: A. Volume is directly proportional to temperature
1. Charles's law is the law of volume at constant pressure.
2. It states $V \propto T$, so $\dfrac{V}{T}$ is constant.
3. Therefore volume is directly proportional to temperature.
4. An inverse relation describes Boyle's law (with pressure), so that option is wrong.
_Source: Samacheer Kalvi (TN SCERT) Class 10 Science, Unit 3 Thermal Physics "Charles's Law", p.44_
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