Pacemakers Implanted in the Chests of Patients with Certain Heart $\rarr$

question 63

Multiple Choice

Pacemakers implanted in the chests of patients with certain heart conditions are powered by a lithium/iodine PVP battery, where PVP represents polyvinylpyridine. The cell reaction and standard cell potential are given below. The standard reduction potential for Li/Li+ is -3.05 V. What is the standard reduction potential for the iodine PVP half-reaction?
2Li(s) + I₂:PVP(s) $\rarr$ 2LiI(s) + PVP(s)
3.59 V

• A) +1.50 V
• B) -6.64 V
• C) -0.54 V
• D) +6.64 V
• E) +0.54 V

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Cholesterol

A waxy substance found in the blood, essential for the formation of cell membranes and certain hormones, but high levels can increase heart disease risk.

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