(a) In a chemical reaction 3 moles of A(g) and 2 moles of B(g) react to form 4 moles of C(g) and 1 mole of D(g). Would you expect DS to be positive, negative, or close to zero for this reaction? DS for this reaction (b) In which of the processes described below should the entropy increase? Choose all of the correct possibilities. ice cubes melting at -5 oC and 1 atm pressure formation of liquid water from hydrogen and oxygen gases gas sprayed onto a cold surface deposits (solidifies) and becomes part of the surface breakdown of large molecules into smaller ones during digestion of a meal formation a liquid by compressing a gas

Chemistry for Engineering Students
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Author:Lawrence S. Brown, Tom Holme
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Chapter10: Entropy And The Second Law Of Thermodynamics
Section: Chapter Questions
Problem 10.69PAE: 10.69 If a sample of air were separated into nitrogen and oxygen molecules (ignoring other gases...
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(a) In a chemical reaction 3 moles of A(g) and 2 moles of B(g) react to form 4 moles of C(g) and 1 mole of D(g). Would you expect DS to be positive, negative, or close to zero for this reaction?


DS for this reaction





(b) In which of the processes described below should the entropy increase? Choose all of the correct possibilities.


ice cubes melting at -5 oC and 1 atm pressure

formation of liquid water from hydrogen and oxygen gases

gas sprayed onto a cold surface deposits (solidifies) and becomes part of the surface

breakdown of large molecules into smaller ones during digestion of a meal

formation a liquid by compressing a gas
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