Exothermic/Endothermic?

Question

askme12345 · Answer

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

askme12345 · Answer

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

aaronq · Answer

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

askme12345 · Answer

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

aaronq · Answer

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

aaronq · Answer

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