At equilibrium, . a. all chemical reactions have ceased b. the rates of the forward and reverse reactions are equal c. the rate constants of the forward and reverse reactions are equal d. the value of the equilibrium constant is 1 e. the limiting reagent has been consumed

b. the rates of the forward and reverse reactions are equal

Explanation:

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.