The following chemical equilibria are studied in this experiment. To become familiar with their behavior, indicate the direction, left or right, of the equilibrium shift when the accompanying stress is applied to the system. a. NH3(aq) is added to Ag+(aq) + Cl- (double arrow) AgCl(s)
b. HNO3(aq) is added to Ag2CO3 (double arrow) Ag+ + CO32-
c. Kl is added to Ag+ + 2NH3 (double arrow) [Ag(NH3)2]+
d. Na2S is added to AgI (double arrow) Ag+ + I-
e. KOH is added to CH3COOH + H2O (double arrow) H3O+ + CH3CO2-
f. HCl is added to 4 Cl- + Co(H2O)62+ (double arrow) CoCl42- + 6 H2O

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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.