The document contains multiple engineering problems involving heat transfer calculations. Problem 7 calculates the temperature at the boundary between a refractory brick layer and insulating material layer based on given temperatures, thicknesses, and thermal conductivities. Problem 15 calculates the time required for a glass sheet to cool from an initial to average temperature in a water stream. Problem Geankoplis 4.1-2 calculates thermal conductivity using given temperatures, heat flux, and material thickness. Problem Geankoplis 5.3-7 calculates the internal temperature of a steel rod after 1 hour of cooling in an oil bath using given properties and conditions.

1. Unit Operations Assignment on Conduction Jacinto, Stephanie Morenos, Jan Monil Sta. Rosa, Clariza Villanueva, Von Kirby 4ChE A Group 7