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When solid NH4NO3 is dissolved in water at 25°C, the temperature of the solution decreases. What is true about the signs of ΔH and ΔS for this process?
(A) ΔH is negative, ΔS is positive
(B) ΔH is negative, ΔS is negative
(C) ΔH is positive, ΔS is positive
(D) ΔH is positive, ΔS is negative
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