Which of these changes produces the greatest

increase in entropy?

(1) CaCO3 (s) - - > CaO (s) + CO2 (g)

(2) 2 Mg (s) + O2 (g) - - > 2 MgO (s)

(3) H2O (g) - - > H2O (l)

(4) CO2 (g) - - > CO2 (s)

I think the correct answer is option 1. The reaction, CaCO3 (s) - - > CaO (s) + CO2 (g), produces the greatest entropy since the products molecules are more disorganized than comparing it to the products of other choices. Entropy is the degree of disorderliness in a system.