2. A brick wall, 225 mm thick and having a thermal conductivity of 0.60 W/(m K), measures 10 m long by 3 m high, and has a temperature difference between the inside and outside faces of 25 K. What is the rate of heat conduction? (Ans: 2000 W or 2 kW) 3. A system weighing 5 Kgs is heated from its initial temperature of 30C to its final temperature of 60C. Calculated the total heat gained by the system. (Specific heat of the system = 0.45 kJ/Kg K) (Ans