you are performing an analysis of a new metalic alloy created in your research lab. you place a 48.1 kg block of this new metal initially at a temperature 12 oc in a rigid insulated box. 0.29 kg of steam at 119 oc is piped into the box and then the box is sealed so that no heat can be transferred in or out. when the system comes to equilibrium, the temperature is 69 oc.