A 0.0414 kg ingot of metal is heated to 243◦C
and then is dropped into a beaker containing 0.411 kg of water initially at 18◦C.
If the final equilibrium state of the mixed system is 20.4◦C, find the specific heat of the metal. The specific heat of water is 4186 J/kg ·◦ C.
Answer in units of J/kg ·◦ C.