P6.5 - Specific Latent Heat (Finished) Flashcards

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1
Q

What is the latent heat of fusion?

A

The energy supplied to a solid substance at it’s melting point for it to melt and turn to a liquid

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2
Q

What happens to latent heat when liquids cool and solidify?

A

It is transferred to the surroundings as the substance solidifies

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3
Q

What is the specific latent heat of fusion of a substance?

A

The energy needed to change the state of 1kg of the substance from solid to liquid, at its melting point

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4
Q

What is the unit of specific latent heat of fusion?

A

J/Kg, joules per kilogram

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5
Q

How do you calculate specific latent heat of fusion?

A

Specific latent heat of fusion = energy transferred / mass

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6
Q

How do you calculate the energy needed to change a substance from solid to liquid?

A

Energy = mass * specific latent heat of fusion

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7
Q

What is latent heat of vaporisation?

A

The energy supplied to cause a liquid to turn to gas at it’s boiling point; the particles to break away from each other

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8
Q

What is the specific latent heat of vaporisation?

A

The energy needed to change the state of 1kg of a substance from liquid to vapour, at it’s boiling point

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9
Q

What is the equation for specific latent heat of vaporisation?

A

Specific latent heat of vaporisation = energy / mass

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10
Q

What is latent heat?

A

The energy needed for a substance to change it’s state without changing its temperature

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