Explanation: The specific heat of zinc is 0.388 J/gC. With 195 grams, we see that for the whole tray, the temperature will change by 1 C for every 75.66J, since (0.388J/gC)*(195g) = 75.66 J/C.
Thus, (2260J)/(75.66J/C) = 29.9 C increase. Add that to 25 to yield 54.9 C (or K, if the 25 was in Kelvin).
Magnesium is known for a long time as the lighter structural metal in the industry, due to it's low weight and to it's capability of forming mechanically resistant alloys.
