4. Consider the reaction CO(g) + 2 H (g) =CH2OH(g) AH° = -94 kJ
and tell what would happen to the equilibrium position
and the equilibrium concentration of H2 for each of the
following changes.
a. The total pressure is reduced.
D. [CO] is increased.
C. [CH3OH) is increased.
d. A catalyst is added.
e. The temperature is reduced.

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.