Select the reactions for which we should expect a delta S (entropy) to be >0. Can...

Select the reactions for which we should expect a delta S (entropy) to be >0. Can select more than one.

CO2 (g) + 2H2 (g)-->CH3OH (l)

2SO2 (g) + O2 (g)--> 2SO3 (g)

Ba(OH)2 (s)-->BaO (s)+ H2O (g)

FeCl2 (s) + H2(g)-->Fe (s)+2HCl (g)

Expert Solution

Hi,

Entropy measures the disorder of a system.

IfS_sys > 0, the system becomes more disordered through the course of the reaction

IfS_sys < 0, the system becomes less disordered (or more ordered) through the course of the reaction.

There are a few basic principles that should be remembered to help determine whether a system is increasing or decreasing in entropy.

Liquids are more disordered than solids.
- WHY? - Solids have a more regular structure than liquids.
Gases are more disordered than their respective liquids.
- WHY? - Gases particles are in a state of constant random motion.
Any process in which the number of particles in the system increases consequently results in an increase in disorder.

For the above question following two reactions, the entropy S would be greater than zero

Ba(OH)2 (s)-->BaO (s)+ H2O (g)

FeCl2 (s) + H2(g)-->Fe (s)+2HCl (g)

Hope this solves your problem

queen_honey_blossom answered 1 year ago

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