Specific latent heat: Particle model of matter: Physics: GCSE (9:1)

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15 Terms

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Latent heat

The energy required or released when a substance changes state

<p>The energy required or released when a substance changes state</p>
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What temperature do changes of state occur at?

At fixed temperatures

<p>At fixed temperatures</p>
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Specific latent heat

The amount of energy required to change the state of one kilogram (1 kg) of the substance with no change in temperature

<p>The amount of energy required to change the state of <span style="text-decoration:underline">one kilogram</span> (1 kg) of the substance with <span style="text-decoration:underline">no change in temperature</span></p>
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Specific latent heat of fusion

The energy required when a substance changes from a solid to a liquid (or the energy released when a substance changes from a liquid to a solid)

<p>The energy required when a substance changes from a solid to a liquid (or the energy released when a substance changes from a liquid to a solid)</p>
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Specific latent heat of vaporisation

The energy required when a substance changes from a liquid to a gas (or the energy released when a substance changes from a gas to a liquid)

<p>The energy required when a substance changes from a liquid to a gas (or the energy released when a substance changes from a gas to a liquid)</p>
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E = mL

The equation linking energy (for a change of state), mass and specific latent heat

<p>The equation linking energy (for a change of state), mass and specific latent heat</p>
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E

The symbol for energy

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m

The symbol for mass

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L

The symbol for specific latent heat

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Joules (J)

The SI unit for energy and work

<p>The SI unit for energy and work</p>
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Kilograms (kg)

The SI unit for mass

<p>The SI unit for mass</p>
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Joules per kilogram (J/kg)

The SI unit for specific latent heat

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How does changing the internal energy of a substance affect it?

The substance will change temperature or change state

<p>The substance will change temperature or change state</p>
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What does the specific heat capacity of a substance tell us ?

The energy required (per kilogram) for the substance to change temperature

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What does the specific latent heat of a substance tell us ...

The energy required (per kilogram) for the substance to change state