The overall reaction in the lead storage battery is
a. For the cell reaction ∆H° = −315.9 kJ and ∆S° = 263.5 J/K. Calculate at −20.°C. Assume ∆H° and ∆S° do not depend on temperature.
b. Calculate at – 20.°C when [HSO4−] = [H+] = 4.5 M.
c. Consider your answer to Exercise 71. Why does it seem that batteries fail more often on cold days than on warm days?
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