Question

Use the Table of Thermodynamic Data to decide which of the following reactions have
K>1 at 298 K:
(i) HCl(g) + NH3(g)-->NH4Cl(s)

(ii) 2 Al2O3(s) + 3 Si(s)-->3 SiO2(s) + 4 Al(s)

(iii) Fe(s) + H2S(g)-->FeS(s) + H2(g).

Which of the products of these reactions are favored by a rise in temperature?

Answer 1

Chris, Terry, and the others. It really helps us help you if you use the same screen name each session.
I don't know what data you have available in your tables but I would try
dGorxn = (n*dGoproducts - n*dGoreactants) and if dGrxn < 0, then K>1.

For the last part, do the same for dHorxn = (n*dHoproducts) - (n*dHoreactants) and if dHorxn is - the reaction is exothermic.