Specific Heat Capacity - AQA Physics
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Specific heat capacity - You need be able to:
• Recall that the amount of energy stored in or released from a system as its temperature changes can be calculated.
• The specific heat capacity of a substance is the amount of energy required to raise the temperature of one kilogram of the substance by one degrees Celsius
• Recall and analyse the required practical on specific heat capacity of materials
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Which is the correct equation for specific heat capacity?
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1 point
energy transferred = mass x temperature change
energy transferred = mass x specific heat capacity x temperature change
energy transferred = specific heat capacity x temperature change
Two different liquids are poured into identical beakers. The same mass is poured and the same heat is provided. The starting temperature is 0C. After 2 minutes Liquid A reaches 60C and Liquid B reaches 30C.
Which statement is correct?
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1 point
Liquid A has a lower heat capacity than liquid B
Liquid A has the same heat capacity as liquid B
Liquid A has a higher heat capacity than liquid B
The energy supplied is 300J. Calculate the specific heat capacity of liquid A.
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1 point
5J/KgC
1500J/KgC
18000J/kgC
36000J/KgC
If an apple pie is cooked in the oven at constant temperature, why is the fruit filling more likely to burn than the pastry?
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1 point
The fruit filling has a lower specific heat capacity and so the temperature rise is lower than the pastry when cooking in the oven
The fruit filling has a lower specific heat capacity and so the temperature rise is higher than the pastry when cooking in the oven
The fruit filling has a higher specific heat capacity and so the temperature rise is lower than the pastry when cooking in the oven
The fruit filling has a higher specific heat capacity and so the temperature rise is higher than the pastry when cooking in the oven
0.5kg of water is heated from 20C to 55C. Calculate the energy transferred to the water, which has a specific heat capacity of 4200J/kgC.
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1 point
157.5J
2310J
73,500J
115,500J
A heater is connected to a power supply with a power of 50W. The heater is placed in a container of water for 30 seconds. The mass of water is 100g. Calculate the temperature change of the water. (Specific heat capacity of water is 4200J/kgC)
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1 point
0.0036 degrees Celsius
0.36 degrees Celsius
3.6 degrees Celsius
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