Heated blocks of iron used to be used to warm beds. a 2058.4 g brick of iron would be heated to 370.0 °c and placed into a box
at the end of the bed. how many joules of energy would be released as it cooled to 25 °c overnight? (specific heat of fe = 0.449
j/g °c)

12 is it do you think so

answer: semi-infinite solid initially at a uniform temperature of 400 ◦c is cooled at its surface by convection. the cooling fluid at a constant temperature of 200 ◦c has a convective coefficient (ha) of 250 w/m2.k. the physical properties of the solid: k = 20 w/m.k and α = 4 * 10-5  m2/s. using δx = 0.04 m and δt = 10 s. write the finite difference equations describing the transient heat transfer of the first five δx and the temperature profile after 30 s.