Which of the following statement is true? P (1) \( \Delta \mathrm{H...

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Which of the following statement is true?
P
(1) \( \Delta \mathrm{H} \) is positive for exothermic reactions
W
(2) \( \Delta \mathrm{H} \) is negative for endothermic reactions
(3) The enthalpy of fusion is negative
(4) The heat of neutralization of strong acid with strong base is always the same
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