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Answered

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)

Verified Answer :

taskmasters

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:

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

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