Charles' Law Mounted | School Science Equipment

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Breckland Scientific Supplies

Charles' Law Mounted

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Price: £21.08

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Stock Update: Only for schools to order
Availability: 2019 Prices held until 2021

Cat. No.: HPG-265-100

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Description

Comprises a capillary tube, which is sealed at the bottom, having a graduated scale from 0 to 200mm. This is mounted onto a plastic former which also has a -10 _ 100°C thermometer mounted alongside the tube. The tube 245 is mm long and needs to be dried in an oven or drying cabinet prior to use to drive off any moisture. A small bead (approx 5mm) of coloured oil will need to be injected intot he tube once dried at about the 50mm mark. The overall length is 350mm with a hole at the top to affix to a retort stand to suspend the apparatus in a tall form beaker of water (not supplied). By heating the water and taking a temperature and scale reading every 30 seconds, a graph of the results can be plotted. Through a line of best fit and extrapolation absolute zero can be demonstrated. The straight line supports Charles′ Law demonstrating that volume of a gas is directly proportional to its temperature provided the pressure is kept constant. (In this case the pressure is atmospheric pressure). The Kelvin scale may then be introduced.

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