10 g of aluminum at 392 F and 20 g of copper at an unknown temperature are dropped into 50 cm of ethyl alcohol at 15 C. The temperature of the aluminum, copper, and alcohol quickly come to equilibrium at 25 C. What was the initial temperature of the copper in C? The following table of material properties might be useful: Material Density (kg/m) Specific Heat (J/(kg K)) Aluminum 2700 900 Copper 8790 385 Gold 19290 129 Ice (H20) 917 2090 Stainless steel 7750 502 Acetic acid 1049 2040 Ethyl alcohol 789 2400 Mercury 13590 140 Water 1000 4184 Platinum 21500 133