A food container has a total area of 0.242 m2. A warm liquid at 42°C is placed in the container. The temperature of the outer wall after thermal equilibrium has been established is found to be 35°C. The container has a thickness of 2.4 mm, and it loses heat to the surroundings at a rate of 191 W. Using this data, determine the thermal conductivity of the material making the container.