Exam 17: Temperature and Heat

Under steady state conditions,a piece of wood 350 mm by 350 mm and 15 mm thick conducts heat through its thickness and loses no appreciable heat through its well-insulated sides.The rate of heat flow is measured to be 14.0 W when the temperature difference across its thickness is 28 C°.Determine the thermal conductivity of this wood.

A 648-g empty iron kettle is put on a stove.How much heat,in joules,must it absorb to raise its temperature from to (The specific heat for iron is ,

The walls of an ice chest are made of 2.00-mm-thick insulation having a thermal conductivity 0.00300 W/m • K.The total surface area of the ice chest is 1.20 m².If 4.00 kg of ice at 0.00°C are placed in the chest and the temperature of the outside surface of the chest is 20.0°C,how long does it take the ice to melt under steady state conditions? The latent heat of fusion of water is 79.6 cal/g = 334 kJ/kg.