6.58 The common lead-acid car battery produces a large burst of current, even at low temperatures, and is rechargeable. The reac- tion that occurs while recharging a "dead" battery is 2PbSO,(s) + 2H,O(1) Pb(s) + PbO,(s) + 2H,SO,(1) (a) Use AH values from Appendix B to calculate AH (b) Use the following equations to check your answer to part (a): rxn (1) Pb(s) + Pb0,(s) + 2SO;(8) → 2P6SO,(s) AH AH =-768 kJ =-132 kJ rxn (2) SO3(g) + H,O(I) H,SO,(1) rxn

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6.58 The common lead-acid car battery produces a large burst of
current, even at low temperatures, and is rechargeable. The reac-
tion that occurs while recharging a "deadď" battery is
2PbSO,(s) + 2H,O(1)
(a) Use AH values from Appendix B to calculate AHn
(b) Use the following equations to check your answer to part (a):
(1) Pb(s) + Pb02(s) + 2SO;(g)
Pb(s) + PbO2(s) + 2H,SO4(1)
rxn
2PBSO4(s)
AH° = -768 kJ
rxn
(2) SO;(g) + H,O(1)
H,SO,(1)
AH = -132 kJ
rxn
Transcribed Image Text:6.58 The common lead-acid car battery produces a large burst of current, even at low temperatures, and is rechargeable. The reac- tion that occurs while recharging a "deadď" battery is 2PbSO,(s) + 2H,O(1) (a) Use AH values from Appendix B to calculate AHn (b) Use the following equations to check your answer to part (a): (1) Pb(s) + Pb02(s) + 2SO;(g) Pb(s) + PbO2(s) + 2H,SO4(1) rxn 2PBSO4(s) AH° = -768 kJ rxn (2) SO;(g) + H,O(1) H,SO,(1) AH = -132 kJ rxn
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