What is the value of ΔG o in kJ at 25 oC for the reaction between...

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What is the value of ΔG o in kJ at 25 oC for the reaction between...

What is the value of ΔG ^o in kJ at 25 ^oC for the reaction between the pair:

Cu(s) and Cr³⁺(aq) to give Cr(s) and Cu²⁺(aq)

Use the reduction potentials for Cr³⁺(aq) is -0.74 V and for Cu²⁺(aq) is +0.34 V.

For these questions, I keep getting a negative answer. The correct answer to this question is 6.3E2, and I put -6.3E2. Why is it a positive number? Isn't the reaction spontaneous?

science chemistry

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Answer 1

Answer #1

As reduction potential of Cu is greater than Cr ,Cu can't be oxidized by Cr.

For thess type of questions, first u decide reduction and oxidation species then after calculate E° by difference between reduction - oxidation.

Reduction at cathode and oxidation at anode.

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Answer 2

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