Consider the reaction
Ni (s) + 4 CO (g) → Ni(CO)4 (g).
At 30°C and PCO = 1 atm, Ni reacts with CO (g) to form Ni(CO) 4 (g). At 200°C, Ni(CO)4 (g) decomposes to Ni (s) and CO (g). This means
1. the forward reaction is endothermic.
2. adding an inert gas like argon favors the forward reaction.
3. the activation energy for the forward reaction is greater than for the reverse reaction.
4. a decrease in pressure favors the forward reaction.
5. K at 30°C is greater than K at 200°C.