Specific Heat Capacity of Aluminium Watch

BobbiBlue
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Please can someone help me with this question?

A calorimeter consists of 140g of aluminium and 300g of water. 6100J of heat raises its temperature by 4.42K. Calculate

a) its heat capacity
b) the specific heat capacity of aluminium
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Shaanv
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For part a it is a matter of rearranging Q=mcT for c and subbing in values.

For part b, multiply ur answer in a by the total mass in a. Then as u know the specific heat capacity of water u can multiply this by the mass of water. The difference between these is the specific heat capacity of aluminium multiplied by the mass of aluminium.
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BobbiBlue
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(Original post by Shaanv)
For part a it is a matter of rearranging Q=mcT for c and subbing in values.

For part b, multiply ur answer in a by the total mass in a. Then as u know the specific heat capacity of water u can multiply this by the mass of water. The difference between these is the specific heat capacity of aluminium multiplied by the mass of aluminium.
Thank you for the reply but for part b) I am still getting the wrong answer?
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Shaanv
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(Original post by BobbiBlue)
Thank you for the reply but for part b) I am still getting the wrong answer?
My bad my method was over complicated and wrong and I apologise.

So as u know the specific heat capacity of water u can work out how much energy was used to heat the water.

So the rest of the energy supplied was used to heat up the aluminium. As u now know the energy required the mass of aluminium and the temperature change u can work out its specific heat capacity.

Hope this helped.
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BobbiBlue
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(Original post by Shaanv)
My bad my method was over complicated and wrong and I apologise.

So as u know the specific heat capacity of water u can work out how much energy was used to heat the water.

So the rest of the energy supplied was used to heat up the aluminium. As u now know the energy required the mass of aluminium and the temperature change u can work out its specific heat capacity.

Hope this helped.

Do I still need to use part a) for part b)?
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Shaanv
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(Original post by BobbiBlue)
Do I still need to use part a) for part b)?
Nope just the initial information in the question👊🏾
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BobbiBlue
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Thank you so much!!!
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