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# Thermochemical calculations help... watch

1. Hi there. Just had lesson on first part of Unit 2 chemistry AS and am stuck on this homework question:

Calculate the molar and specific heat capacities of the iron from the following information. When 20g of the Fe at 373K was transferred to 80g of H20 at 303K in a container of negligible heat capacity the temperature of the water rose to 304.9K.

I know I have to rearrange the equation which I'm fine with <c = Q/(m + T> but I have no idea where to start, even! Please help
2. (Original post by lattywatty)
Hi there. Just had lesson on first part of Unit 2 chemistry AS and am stuck on this homework question:

Calculate the molar and specific heat capacities of the iron from the following information. When 20g of the Fe at 373K was transferred to 80g of H20 at 303K in a container of negligible heat capacity the temperature of the water rose to 304.9K.

I know I have to rearrange the equation which I'm fine with <c = Q/(m + T> but I have no idea where to start, even! Please help
calculate the energy change in the water = mcΔT
this must be equal to the energy change in the iron

you know the mass of iron, you know the temperature change in the iron and you know the energy that caused that temperature change so using E = mcΔT again for the iron you can find the specific heat capàcity of the iron.

To get the molar value use the mass of 1 mole of iron

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