Kinetic Molecular Theory Flashcards

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1
Q

Particles

A

a minute portion of matter.

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2
Q

Pure substance

A

is a form of matter that has a constant composition and properties that are constant throughout the sample

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3
Q

temperature

A

the average kinetic energy of the particles of matter. When particles of matter move more quickly, they have more kinetic energy, so their temperature is higher

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4
Q

solid

A

The molecules in a solid are closely packed together and contain the least amount of kinetic energy

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5
Q

liquid

A

one of the states of matter. The particles in a liquid are free to flow, so while a liquid has a definite volume, it does not have a definite shape.

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6
Q

Gas

A

A gas is one of the four fundamental states of matter consisting of particles that have neither a defined volume nor shape.

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7
Q

Phase change

A

a change from one state (solid or liquid or gas) to another without a change in chemical composition

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8
Q

Thermal Energy

A

is produced when a rise in temperature causes atoms and molecules to move faster and collide with each other. The energy that comes from the temperature of the heated substance is called thermal energy

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9
Q

kinetic energy

A

the kinetic energy of an object is the energy that it possesses due to its motion

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10
Q

absolute zero

A

the lowest temperature that is theoretically possible, at which the motion of particles that constitutes heat would be minimal. It is zero on the Kelvin scale, equivalent to –273.15°C or –459.67°F.

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