Constant-Volume Thermometer for Charles’ Law Demonstrations ,1m
$219.00(Ex GST)
- Constant volume thermometer for Charles’ law practicals, shows pressure–temperature behaviour of trapped air.
- Air sample heated to known temperature points, volume held constant by adjusting mercury column.
- Measures pressure change versus temperature at fixed volume, practical route to gas law relationships.
- Similar in method to Boyle’s law style apparatus, controlled column adjustment supports accuracy.
- Constant-volume approach easier to perform accurately than constant-pressure volume change method.
- Description
- Datasheets & Manuals
Description
The constant volume thermometer (CVT) is an apparatus used to demonstrate Charles’ law behaviour by establishing the pressure–temperature relationship of a fixed volume of air. It operates in a way similar to a Boyle’s law style setup: a trapped volume of air is heated to a known temperature, then the mercury column is adjusted so the air volume remains constant while measurements are taken.
By holding the air volume constant, the CVT makes it easier to obtain accurate results in practical classes, while still showing the key gas law relationship between pressure and temperature. In the theoretical form of Charles’ law, volume changes at constant pressure, but this constant-volume method provides a practical classroom route to the same underlying temperature dependence using controlled adjustment of the mercury column.
FAQs
Q: What law does the constant volume thermometer demonstrate?
A: It is used to demonstrate Charles’ law behaviour by establishing the pressure–temperature relationship of a fixed gas volume.
Q: What is kept constant during the experiment?
A: The volume of the trapped air is kept constant.
Q: What is adjusted to keep the volume constant?
A: The mercury column is adjusted so the air volume remains constant at each temperature point.
Q: What relationship is measured?
A: The relationship between pressure and temperature of the trapped air at constant volume.
Q: How does this differ from the theoretical Charles’ law method?
A: Theoretical Charles’ law allows volume to change at constant pressure, this apparatus keeps volume constant for easier accurate measurement.
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