A 128-g block of an unkown substance with a temperature of 92.0 OC is placed in a styrofoam cup containing 0.348 kg of water at 22.0 OC. The system reaches an equilibrium temperature of 24.2 OC. What is the specific heat, cx, of the unknown substance if the heat capacity of the cup is neglected? Cwater = 4,186 J/kg-OC.
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