I’ve been to my chemistry lecture and I wasn’t able to understand these key poin

Question

I’ve been to my chemistry lecture and I wasn’t able to understand these key points. Could anyone answer this set of questions explain their answer in their own words?
Please remember Chegg's 5 subsets per question policy, which means that you must go over all of these problems (4, 5, 6) instead of answering only one. 4.) Above what temperature does the following reaction become nonspontaneous? FeO(s) + CO(g) CO2(g) + Fe(s) AH=-11.0 kJ, as--1 7.4 J/K 5.) For a given compound, list the decreasing order of entropy for a liquid, solid, and gas A) solid> gas>iquid B) liquid> solid> gas C) gas > liquid>solid D) gas > soliiquid 6.) 33) Calculate STXn for the following reaction. The S° for each species is shown below the reaction. C2H2(g)+H2(g)C2H4(g) S(J/moIK) 200.9 130.7 219.3 A) +2.3 J/K B) +550.9 J/K C)-112.3 J/K D) +337.1 J/K E) -550.9 J/K

Explanation / Answer

(4)

if G>0 then reaction becomes nonspontaneous

Now

G=H-TS

if G=0 means

-11000-T*(-17.4)=0

T=632.18 K

This is equlibrium temperature

Now we increase 0.1% temperature then also the reaction becomes nonspontaneous.

So T>632.18 then G>0 then reaction becomes nonspontaneous.

(5)

gas>liquid>solid

The gas particles move freely and therefore, the degree of randomness is the highest.

For liquid state, still the particles are moving but less freely than the gas particles and more than the solid particles.

(6)

Srxn=Sproduct-S reactant=219.3-(200.9+130.7)=-112.3 J/mol K

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