Problem- In an experiment, the student placed a test tube containing a pink equilibrium mixture on a hot plate. The solution began to boil and turned blue. A second test tube with the same pink equilibrium mixture was placed in an ice bath. The solution turned a slightly lighter pink.
Part a- Is the forward reaction of [Co(H2O)6]Cl2(pink) --> COCl2(H2O)2 (blue) +4H2O equilibrium exothermic or endothermic?
Part b- Briefly define how the student's observations support your answer to (a.)