Question

In which of the following will entropy and enthalpy factors favour the establishment of an equilibrium?

A. CaCO3 (s) + 178 kJ -> CaO (s) + CO2 (g)
B. Mg(s) + 2HCl(aq) -> MgCl2 + H2(g) + 425kJ
C. 2C(s) + 2H2(g) -> C2H4(g), Enthalpy Change = 52.3 kJ

Thank you! :)

Answer 1

B = entropy

Answer 2

The answer given on the answer key is A, but I'm not entirely sure why.