When 13.8 ml of 0.870 M lead(II) nitrate reacts with 90.0 ml of 0.777 M sodium chloride, 0.579 kJ of heat is released at constant pressure. What is AH° for this reaction? Pb(NO3)2(aq) + 2NaCI(aq) → PbCl2( s) + 2NANO3(aq) a. 48.3 kJ b. 57.6 kJ С. 39.9 kJ d. 31.6 kJ е. 23.3 kJ

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