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Question: Answered & Verified by Expert
A constant pressure air thermometer gave a reading of 47.5 units of volume when immersed in ice cold water and 67 units in a boiling liquid. The boiling point of the liquid will be
PhysicsThermal Properties of MatterNEET
Options:
  • A 135 °C
  • B 125 °C
  • C 112 °C
  • D 100 °C
Solution:
1057 Upvotes Verified Answer
The correct answer is: 112 °C

Initial volume, V1=47.5 units
Temperature of ice cold water, T1=0 °C=273K
Final volume, V2=67 units

Applying Charles's law, we have V1T1=V2T2 (where temperature T2 is the boiling point)
T2=V2V1×T1=67×27347.5=385 K=112 °C

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