A Cu rod of length 50cm and diameter 2cm has one of its ends in steam and the other end in a beaker of a mixture of ice and water. How much heat current will be conducted through the rod in 20 minutes?

Do you know the basic law for heat flow in thermal conduction?


\frac {\Delta Q} {\Delta t}= - k A \frac {\Delta T} L


where \Delta Q/\Delta t is heat flow in joules/second (or watts) and 'k' is the material's conductivity in units of watts per meter per kelvin. The value for 'k' for copper is probably given in your text book. 'A 'is the cross-sectional area of the rod and 'L' is its length. Plug in the values and calculate the answer.