Increase in Entropy
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Thinking about entropy as disordered states, which of the following reactions would show an increase in entropy? Mark those in which entropy increases as TRUE.
None of these reactions are balanced.
H2 + O2 → H2O
1. True
2. False
CaCO3 → CaO + CO2
1. True
2. False
H2O(l) → H2O(s)
1. True
2. False
S8(s) → S(g)
1. True
2. False
Na + Cl2 → NaCl
1.True
2. False
N2O → N2 + O2
1. True
2. False
C6H12O6 + O2 → CO2 + H2O
1. True
2. False
Hg(l) → Hg(g)
1. True
2. False
Cu + O2 → CuO
1. True
2. False
CO2 + H2 → C + H2O
1. True
2. False
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Solution Summary
The solution considers the entropy changes in a number of reactions.
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H2 + O2 → H2O
Entropy does not increase here because the number of molecules decreases. In other words, there is now more order in the universe, not less.
CaCO3 → CaO + CO2
This is the reverse of the equation above. We go from there being one chemical formula to two chemical formulae. Therefore, the randomness of the universe increased. Entropy ...
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