8. Thermochemistry
Constant-Pressure Calorimetry
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What is the standard heat capacity in kilojoules per degree Celsius of a calorimeter that absorbs 87 joules at its temperature as its temperature goes from 33 degrees Celsius to 38.1 degrees Celsius. Alright. So your standard heat capacity is c, capital c, and remember it equals q divided by change in temperature. Here we need to convert our joules into kilojoules because they want the unit in kilojoules. So we have 87.0 joules. Remember that 1 kilo is 10 to the 3 joules here. So that's 0.087 kilojoules. Take that and plug it in. And then delta t is our change in temperature. Final temperature minus initial temperature. So when we do that, we're gonna get our answer in kilojoules over degrees Celsius. This comes out to be 0.01 71 kilojoules over degrees Celsius. Here, our answer is gonna be given to us in 3 sig figs because I'm using 87.0 joules as my reference. Here our temperatures could also be used. This has 2 significant figures. This has 3. But just to give more detail into our answer, we're gonna go with 3 significant figures.
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