Question

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)

Answer 1

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.

Answer 2

Answer:

Was this correct? I am pretty sure it is since you are going from a solid to a gas in the first reaction.

Explanation:

(1) CaCO3(s) --> CaO(s) + CO2(g) --- solid to solid & gas ** most entropy here

(2) 2 Mg(s) + O2(g) --> 2 MgO(s) solid & gas to a solid

(3) H2O(g) --> H2O(l) gas to a liquid

(4) CO2(g) --> CO2(s)   gas to a solid