In the laboratory a student finds that it takes 123 Joules to increase the tempe

Question

In the laboratory a student finds that it takes 123 Joules to increase the temperature of 10.4 grams of solid aluminum from 24.8 to 39.0 degrees Celsius. The specific heat of aluminum she has measured is J/g degree C. In the laboratory a student finds that it takes 165 Joules to increase the temperature of 14.0 grams of solid aluminum from 24.8 to 37.2 degrees Celsius. The specific heat of aluminum she has measured is J/g degree C. In the laboratory a student finds that it takes 20.9 Joules to increase the temperature of 11.7 grams of solid aluminum from 24.8 to 39.0 degrees Celsius. The specific heat of aluminum she has measured is J/g degree C.

Explanation / Answer

Q = heat added = mass * specific heat * change in temperature

1        123 = 10.4* Al * [39-24.8]

         Al = 123/[10.4*14.2] = 0.832J/kgC

2        165 = 14* mg * [37.2-24.8]

         Mg = 165/[14*12.4] = 0.95046j/KgC

3    20.9 = 11.7 * Xe * [35.8 - 23.8]

      Xe = 20.9/11.7*12 = 0.1489j/KgC

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