To determine co-efficient of expansion of a gas at constant pressure. A glass U-tube with a bulb and stopcock at one end, the other limb being open. An outlet tube from the bottom of the U tube passes through a rubber bung and has a stopcock at the end. The stem below the bulb is graduated 3 x 0.1 ml. An inlet tube with a mohr clip also passes through the bung. A glass water jacket encloses the U tube. All glass parts made of borosilicate glass requires only 20 ml mercury, which is not included.
Features
Graduated U-tube: It typically features a glass U-tube (approx. 15 mm diameter), with one plain limb (approx. 220 mm long) and another graduated limb (25 to 35 x 0.2 ml, 120 mm long) terminating in a bulb (approx. 38 mm diameter). Water Jacket System: The U-tube is enclosed within a glass water jacket, which allows for controlled heating or cooling of the air sample. Constant Pressure Mechanism: An outlet tube from the bottom of the U-tube, with rubber tubing and a pinch or Mohr clip, helps maintain constant pressure (atmospheric pressure) during the experiment. Borosilicate Glass Construction: All glass components are made from durable borosilicate glass, ensuring safety and longevity in a lab setting. Volume Measurement: The graduated stem below the bulb allows for accurate measurement of the gas volume changes. Determination of Absolute Zero: The apparatus is suitable for experiments that aim to determine the coefficient of expansion of a gas and estimate the Celsius value for absolute zero through extrapolation of results. Accessories (Sold Separately): The apparatus itself requires additional items for use, such as a thermometer, mercury (approx. 20 ml required, but not included), a Bunsen burner, tripod, and fire-spreading net. Educational Value: It serves as an essential teaching aid for physics and chemistry laboratories, providing a practical and visual understanding of Charles's Law and the kinetic theory of gases.