A fi rewall separates two rooms. In one room, a fi re has started. Th e fi rewall is made of stainless steel that is 1/2 in. thick. Heat in the room is suffi cient to raise the outside surface...

A fi rewall separates two rooms. In one room, a fi re has started. Th e fi rewall is made of stainless steel that is 1/2 in. thick. Heat in the room is suffi cient to raise the outside surface temperature of one side of the wall to 350°F. If the thermal conductivity of the metal wall is 9.4 BTU/hr · ft · °R, and the heat fl ux is 6.3 BTU/s · ft2, determine the surface temperature of the other side of the fi rewall.