A coffee-cup calorimeter contains 150.0 g of water at 25.3 °C. A 124.0-g block of copper metal is heated to 100.4 °C by putting it in a beaker of boiling water. The specific heat of Cu(s) is 0.385 J/g·K. The Cu is added to the calorimeter, and after a time, the contents of the cup reach a constant temperature of 30.1 °C.

Determine the amount of heat, in J, lost by the copper block.