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The following enthalpy and entropy changes are known for the reactions shown at 298 K. Reaction Cu(s) +...

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Chemistry

The following enthalpy and entropy changes are known for thereactions shown at 298 K.

ReactionCu(s) + 2H+(aq) <=> Cu2+(aq) +H2(g)Zn(s) + 2H+(aq) <=> Zn2+(aq) +H2(g)
delta H65 kJ/mol-153 kJ/mol
delta S-2.1 J/mol K-23.1 J/mol K

Part a

Which of the these two metals, Zn or Cu, should dissolve in 1 Macid solution? Explain your answer.

Part B -

Calculate Eo for the Zn reaction. Show work tosupport your answer.

Part C -

Which of the two reactions has an equilibrium constant thatincreases with temperature? Explain your answer.

Part D -

Would you have expected that both reactions would have had anegative change for delta S? How can you explain delta S is lessthan zero for these reactions?

Answer & Explanation Solved by verified expert
3.5 Ratings (584 Votes)
a the reduction potential of zn is less than that of hydrogen while reduciton potential of copper is high So Zn will be a better reducing agent and can reduce H to hydrogen and itself get    See Answer
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