3 • Quantity of Heat

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22 Terms

1
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What factors does the heat gained or lost by a body depend on?

  1. Mass

  2. Specific Heat Capacity

  3. Temperature Change

2
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Define Heat Capacity (C)

The amount of heat required to raise the temperature of a body by 1K

3
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Define the SI Unit for Heat Capacity

JK-1

4
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<p><span style="color: rgb(0, 0, 0);"><span>Label This Formula</span></span></p><p><span style="color: rgb(0, 0, 0);"><em><span>Heat Capacity</span></em></span></p>

Label This Formula

Heat Capacity

Q - Heat Energy

C - Heat Capacity

Temperature Change

5
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Define Specific Heat Capacity (c)

The amount of heat required to raise the temperature of 1kg of a substance by 1K

6
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Define the SI Unit for Specific Heat Capacity

J Kg-1 K-1

7
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<p><span style="color: rgb(0, 0, 0);"><span>Label This Formula</span></span></p><p><span style="color: rgb(0, 0, 0);"><em><span>Specific Heat Capacity</span></em></span></p>

Label This Formula

Specific Heat Capacity

Q - Heat Energy

m - mass

c - specific heat capacity

Temperature change

8
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Name a use of specific heat capacity

Storage Heaters

9
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Demonstrate the process of Storage Heaters

  1. High SHC

  2. Cheap Night time electricity heats blocks

  3. Releases heat during the day

10
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Define Latent Heat (L)

The heat required to change the state of a body without a rise in temperature

11
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Define the SI Unit of Latent Heat

Joule

J

12
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<p><span style="color: rgb(0, 0, 0);"><span>Label This Diagram</span></span></p><p><span style="color: rgb(0, 0, 0);"><em><span>Latent Heat</span></em></span></p>

Label This Diagram

Latent Heat

a - Temperature (K)

b - Time (s)

c - melting point

d - latent heat of fusion

e - boiling point

f - latent heat of vaporisation

13
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Define Specific Latent Heat (L)

The heat required to change the state of 1kg of a substance

14
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Define the SI Unit for Specific Latent Heat

J kg-1

15
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<p>Label This Formula</p><p><em>Specific Latent Heat</em></p>

Label This Formula

Specific Latent Heat

Q - Heat Change

M - Mass

L - specific Latent Heat

16
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Name the types of Specific Latent Heat

  1. Specific Latent Heat of Fusion

  2. Specific Latent Heat of Vaporisation

17
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Define Specific Latent Heat of Fusion

The heat required to change kg of a solid to 1kg of a liquid at its melting point without a rise in temperature

18
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Define Specific Latent Heat of Vaporisation

The heat required to change kg of a liquid to 1kg of vapour at its melting point without a rise in temperature

19
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Name 2 examples of Latent Heat

Perspiration

Heat Pump

20
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Demonstrate the process of Perspiration

  1. Water evaporates from the surface of our skin

  2. Removes latent heat and cools us down

21
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<p><span style="color: rgb(0, 0, 0);"><span>Label This Diagram</span></span></p><p><span style="color: rgb(0, 0, 0);"><em><span>The Heat Pump</span></em></span></p>

Label This Diagram

The Heat Pump

a - Cold

b - Hot

c - Expansion Valve

d - Compressor

e - Gas

f - Liquid

22
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Demonstrate how a heat pump works

  1. Heat taken in by liquid evaporating

  2. Heat taken out by vapour condensing