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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.

Verified Answer :

meerkat18

We are given with 4.2 joules or energy and the raise of temperature is 1 degree celsius per 1 ml. Hence, the specific heat of 4.2 / ml degrees. This is consistent with the second conditions. The amount of energy needed to raise the temperature by 1 degree for 200 ml coffee is 4.2 J * 200 or 840 Joules.

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