2.2 (b). Measurement of temperature Damchuilung Kamei.

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Presentation transcript:

2.2 (b). Measurement of temperature Damchuilung Kamei

Measuring Temperature - - Measures the hotness and coldness of an object -Determined by using a thermometer that contains a liquid that expands with heat and contracts with cooling.

-Gabriel Fahrenheit ( ), in the early years of the eighteenth century, invented the Fahrenheit scale. He set the freezing point of water at 32 degrees and the boiling point at 212 degrees. And these two points formed the anchors for his scale.

Anders Celsius ( ) Anders Celsius later in 1743 invented the Celsius scale. Using the same points, he determined that the freezing point for water to be 0 and the boiling point to be 100 degrees. This Celsius scale is now known as a universal system unit and used in most countries.

Measurement of water in Fahrenheit/Celsius

Kelvin The Kelvin degrees Is designed by Lord Kelvin. The Kelvin scale is designed to go to zero at its minimum temperature. At a temperature of absolute zero, there is no motion or heat.

Thermal Equilibrum Thermal Equilibrium Thermal Equilibrium is reached when all the molecules of both have the same molecular motion. For instance, if a cartoon of milk from the refrigerator is set on the kitchen’s countertop, the two objects are in thermal contact.

Thank You

Bibliography Text pictures m/chemistry/glossary/Kelvin.shtml m/chemistry/glossary/Kelvin.shtml s.org/measurement- temperature/ s.org/measurement- temperature/