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Answer 1

If you want to determine what metal you have, and you know it is a pure metal, it can be identified simply by knowing its specific heat capacity #C_P# in #"J/g"^@ "C"#, i.e. how much heat it takes to raise #"1 g"# of the substance temperature by #1^@ "C"#.

Heat flow #q# is the amount of heat content in #"J"# flowing through a substance, which causes it to change in temperature. Knowing #q# and the change in temperature, #DeltaT#, as well as the mass of the substance in #"g"#, the heat capacity can be determined:

#q = mC_PDeltaT#

We were given:

Therefore:

#C_P = q/(mDeltaT)#

#= ("6.35 J")/("15.0 g" xx (18.8^@ "C" - 17.7^@ "C"))#

#= color(blue)("0.385 J/g"^@ "C" -= C_(P("Cu")))#

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Answer 2

Cooper Adams

Could you provide more context or specific details about the question you're having trouble understanding?

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.