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Hello.
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Today we'll be talking about chapter 15, question 18, which asks us to consider why water is so important when we make a calerimeter, which measures heat gained or lost by a system.
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And so, to answer this, we need to think about what it means to measure transfer of heat in a system.
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So we have the equation q equals m times the specific heat, times the change in temperature of that object.
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Unfortunately, we might not be able to know the specific heat of a given object if we have, say, something that isn't pure, not a pure object.
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Thus, this makes it very difficult for us to measure the heat just by measuring the temperature of our given object.
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However, we know that heat is never created or destroyed.
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So heat is not created or destroyed...