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P1: Quiz 5
P1: Quiz 5
1)
a) Give a definition for specific heat capacity.
b) What are the units for specific heat capacity?
2) Write down the equation for working out the change in energy in a substance’s thermal energy store. Write the units for all of the values as well.
3) Work out the change in energy in the thermal energy store of 1.7 kg of water if we increase the temperature of the 1.7 kg of water by 40°C. Give your answer in joules.
The specific heat capacity of water is 4,181 j/kg°C.
4) Work out the change in energy in the thermal energy store of 900 grams of copper if we increase its temperature from 20°C to 80°C. Give your answer in kilojoules.
The specific heat capacity of copper is 450 j/kg.
5) 250 grams of aluminium is at an initial temperature of 30°C. Find the final temperature of the 250 grams of aluminium after we transfer 20,631 joules of energy to the thermal energy stores of the aluminium.
The specific heat capacity of aluminium is 897 j/kg°C.
a) Give a definition for specific heat capacity.
b) What are the units for specific heat capacity?
2) Write down the equation for working out the change in energy in a substance’s thermal energy store. Write the units for all of the values as well.
3) Work out the change in energy in the thermal energy store of 1.7 kg of water if we increase the temperature of the 1.7 kg of water by 40°C. Give your answer in joules.
The specific heat capacity of water is 4,181 j/kg°C.
4) Work out the change in energy in the thermal energy store of 900 grams of copper if we increase its temperature from 20°C to 80°C. Give your answer in kilojoules.
The specific heat capacity of copper is 450 j/kg.
5) 250 grams of aluminium is at an initial temperature of 30°C. Find the final temperature of the 250 grams of aluminium after we transfer 20,631 joules of energy to the thermal energy stores of the aluminium.
The specific heat capacity of aluminium is 897 j/kg°C.