Question

Exothermic/Endothermic?

Answer 1

Co2+(aq) + 4Cl -(aq) --> CoCl42-(aq)
is this endo or exo thermic?

Answer 2

When the temperature is decreased the equilibrium concentration of CoCl42-:

Answer 3

are you supposed to find whether it's endo or exo with Hess's law?

Answer 4

i believe so it says

In an aqueous chloride solution cobalt(II) exists in equilibrium with the complex ion CoCl42-. Co2+(aq) is pink and CoCl42-(aq) is blue

at low temp its pink, high temp its blue @aaronq

Answer 5

okay, so you can figure out whether it's endo or exo from that info.

At high temp the forward eq. is favoured, that means that

Reactant + heat -> Products

Answer 6

which means that energy needs to be put into the system, making the process endothermic.