Physics P1 1.8 Specific heat capacity.

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When an object is heated, what happens as the mass of an object becomes greater?
The more slowly its temperature increases.
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What does the rate of temperature change in a substance when heated depend on?
The energy transferred to it, its mass and its specific heat capacity.
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What happens when we heat a substance?
We transfer energy to it which will increase its temperature.
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What is the specific heat capacity of a substance?
The amount of energy required to raise the temperature of 1 kilogram of the substance by 1 degree Celsius. Different substances have different specific heat capacities.
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What implications does the specific heat capacity of a substance have when heating the substance?
Greater the specific heat capacity = more energy required per degree temperature change. More energy is needed to raise temperature of a substance with a higher specific heat capacity than equal Kg of a substance with a lower specific heat capacity.
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What happens to he energy required as the mass of a substance being heated becomes greater?
More energy is required for each degree temperature change. More of a substance = more energy needed to raise temperature by the same amount.
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What is the equation for specific heat capacity?
E = m x c x (O with ~ through it).
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In the equation for specific heat capacity, what is E?
Energy transferred in J.
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In the equation for specific heat capacity, what is m?
Mass in kg.
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In the equation for specific heat capacity, what is c?
Specific heat capacity in J/kg degrees Celsius.
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In the equation for specific heat capacity, what is (O with ~ through it)?
Temperature change in degrees Celsius.
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The specific heat capacity of oil is 2100J/kg degrees Celsius.How much energy is needed to raise the temperature of 1kg of oil by 1 degree Celsius?
The energy needed is 2100J.
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The specific heat capacity of water is 4200J/kg degrees Celsius. How much energy is needed to raise the temperature of 2kg of water by 1 degree Celsius?
The energy needed is 8400J.
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*IN AN EXAM IT MAY BE NECESSARY TO WORK OUT THE CHANGE IN TEMPERATURE BY SUBTRACTING THE INITIAL TEMPERATURE FROM THE FINAL TEMPERATURE**
**
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Card 2

Front

What does the rate of temperature change in a substance when heated depend on?

Back

The energy transferred to it, its mass and its specific heat capacity.

Card 3

Front

What happens when we heat a substance?

Back

Preview of the front of card 3

Card 4

Front

What is the specific heat capacity of a substance?

Back

Preview of the front of card 4

Card 5

Front

What implications does the specific heat capacity of a substance have when heating the substance?

Back

Preview of the front of card 5
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