Calcium carbonate decomposes at high temperatures to calcium oxide and carbon di
ID: 486510 • Letter: C
Question
Calcium carbonate decomposes at high temperatures to calcium oxide and carbon dioxide: CaCO_3 (s) doubleheadarrow CaO (s) + CO_2 (g). This reaction has an enthalpy of Delta H^0 = 178 kJ/mol. Which of the following statements about this equilibrium is NOT right? Adding more CaCO_3 to the system at equilibrium, the reaction has no net changes. Adding more CaO to the system at equilibrium, the reaction also has no net changes. Increase the reaction temperature, the reaction will shift to the left. Increase the reaction temperature, the reaction will shift to the right.Explanation / Answer
Option C is not correct.
Since it is endothermic reaction according to lechatlies principle, the equilibrium will shift toward right, i.e. towards product.
raising the temperature means supplying heat to the system, so equilibrium will try to decrease the heat.. it will utilize that heat to move towrds endothermic side.