A student calibrates a coffee-cup calorimeter by mixing two equal masses (100. g each) of liquid water, one at 90.0 °C and the other at 25.0 °C. The final temperature recorded is 47.0 °C.
Immediately afterward, the student places a 40.0 g sample of an unknown metal at 150.0 °C into 100. g of water at 25.0 °C in the same calorimeter. The final temperature of this second mixture is 30.0 °C.
Using the data from both trials, calculate the specific heat capacity of the metal (in J g⁻¹ °C⁻¹).