IsTim
  • IsTim
In Part A, you determined that the heat added to the coffee is what you got. If it takes 4.2 J of energy to raise the temperature of 1.0 mL of coffee by 1.0∘C, then it should take twice as much energy to raise the temperature of 2.0 mL of coffee by 1.0∘C, or to raise the temperature of 1.0 mL of coffee by 2.0∘C. Multiply carefully to find the total amount of energy needed to raise the temperature of 200 mL of coffee by the required number of degrees.
Physics
schrodinger
  • schrodinger
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IsTim
  • IsTim
The answer is 2.52×10^4 J
wolfe8
  • wolfe8
Oh this again. Hmm what I understand is, you need 4.2/1 J/ml per degree. So I guess you multiply that by what volume and degree you want?
IsTim
  • IsTim
Yeah, I and another person got this answer for this question, but it was apparently wrong.

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IsTim
  • IsTim
The result you say would be 840J right?
wolfe8
  • wolfe8
Yes. Does it say what degrees you want?
IsTim
  • IsTim
it wants 3 sig figs, but no degrees.

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