HOPE’S APPARATUS

HOPE’S APPARATUS

Hope’s Apparatus – Physics Equipments

• Hope devised a simple arrangement, known as Hope’s apparatus.
• Used to demonstrate the anomalous behavior of water.
• It is a common experiment that when a liquid is heated, it expands, irrespective of the temperature range.
• Comprising a cylindrical vessel, surrounded by an annular trough,
• In which is to be placed a mixture of ice and salt.
• The respective temperature of the water at the top and bottom of inner cylindrical vessel are measured over a period as the water cools.
• Supplied without thermometer.
• To show that water has a maximum density at 4 degrees Celsius.
• Consists of a sheet metal cylinder with two tubes in the upper and lower regions for inserting thermometers through rubber stoppers.
• Mounted on a base and encircled midway by an outer trough for holding a mixture of ice and salt.
• Temperature of the water is measured at the top and bottom of the inner cylindrical vessel over a period as the water-cools.
• Thermometer not included.

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