We’re being asked topredict how the entropy of every substanceisaffected through the given process.
You are watching: Predict how the entropy of the substance is affected in the following processes.
Recall thatentropyis thedegree of chaos or disorder the a systemand that it relies on the following:
1. Phase:Thegas phase has actually the highest entropy, adhered to by the liquid, and then thesolid phase through the lowest entropy.
Gas > fluid > Solid
2. Complexity:More elementsin the compound leads tohigher entropy.
Ex. NO3(g)<4 elements>has greater entropy than NO2(g)<3 elements>.
3. Mass:Thegreater the mass, climate thegreater the entropy.
For a offered process,entropy (ΔS) will either rise or decrease.
Remember thatphase changes lead to a change in entropy:
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Predict exactly how the entropy that the problem is affected in the complying with processes:
a) Ar(l) → Ar(g)
b) Cu(s, 300 K) → Cu(s, 800 K)
c) H2O (g, 75 Torr, 300 K) → H2O(g, 150 Torr, 300 K)
Which that the adhering to reactions have actually a positive ΔSrxn? inspect all the apply.
a) A(s) + B(s) → C(g)
b) A(g) + B(g) → C(g)
c) 2A(g) + B(g) → 4C(g)
d) 2A(g) + B(g) → C(g)
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