Calculate E°_cell and Indicate Whether the Overall Reaction Shown Is $\to$

question 53

Multiple Choice

Calculate E°_cell and indicate whether the overall reaction shown is spontaneous or nonspontaneous.
O₂(g) + 4H⁺(aq) + 4e^-
2H₂O(l) ;E° = 1.229 V
Al³⁺(aq) + 3e^-
Al(s) ;E° = -1.662 V
Overall reaction:
4Al(s) + 3O₂(g) + 12H⁺(aq) $\to$ 4Al³⁺(aq) + 6H₂O(l)

• A)E°_cell = -2.891 V,nonspontaneous
• B)E°_cell = -2.891 V,spontaneous
• C)E°_cell = 2.891 V,nonspontaneous
• D)E°_cell = 2.891 V,spontaneous
• E)Spontaneous,but none of these values of E°_cell is correct.

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Definitions:

Means

Means refer to the average values of sets of data, calculated by summing all values and dividing by the number of data points.

≠ 0

Symbol indicating that a quantity or difference is not equal to zero, often used in hypotheses testing to signify a non-null effect.

Standard Error

The standard deviation of the sampling distribution of a statistic, often used to estimate the accuracy of sample mean as an approximation of the population mean.

Means

The arithmetic averages of a set of numbers or data points.