'760 mm' diaporamas de présentation

What changes about the atoms in a substance as it gets warmer?

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The Gas Laws

The Gas Laws. The density of a gas decreases as its temperature increases. Chemical Properties Produce Gases. Chemists harness chemical properties to produce a desired gas through chemical reactions. Such as the reaction of zinc and hydrochloric acid. Physical Properties of Gases.

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1.7. Pressure

1.7. Pressure. GCSE Physics. David Raju Vundi. Pressure. Pressure is the amount of force applied to a known area. We can calculate it using the equation Pressure = Force (N) / Area (m 2 ). We can reduce pressure by reducing the size of the force or increasing the size of the area.

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I. Physical Properties

12.1- Gases. I. Physical Properties. A. Kinetic Molecular Theory. kinetic-molecular theory: (def) theory of the energy of particles and the forces that act between them; based on idea that particles of matter are always in motion Kinetic molecular theory describes the motion of an ideal gas.

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The Nature of Gases - Part 2

The Nature of Gases - Part 2. Gas Pressure. Introduction. Gas pressure is the result of the force of gas molecules exerted on a surface. The force of a single molecule of gas in insignificant, but the force of trillions of molecules becomes measurable.

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Ch. 10

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Pressure & Temperature

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Measuring Pressure

Measuring Pressure. Torricelli Barometer. The mercury in the tube pushes down with its weight. The bottom of the tube is open to the atmosphere. The air pushes on the open surface of the mercury.

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Measuring Pressure

Measuring Pressure. Torricelli Barometer. The mercury in the tube pushes down with its weight. The bottom of the tube is open to the atmosphere. The air pushes on the open surface of the mercury.

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Vacuum

The discovery of atmospheric pressure. Vacuum. In 1643 the Italian scientist E. Torricelli picked up a tube one metre long sealed at one end, filled it with mercury and shut the open end with this finger.

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