Asked by Student

A calorimeter contains 30.0 mL of water at 15.0 C. When 1.50 g of X (a substance with a molar mas of 46.0g/ mol is added, it dissolves via the reaction

X (s) + H2O (l) ----> X (aq)

and the temperature of the solution increases to 26.5 C.

Calculate the enthalpy change for this reaction.



So is the answer supposed to be positive.
Answered by DrBob222
No. The temperature increased from 15 to 26.5 and that makes it an exothermic reaction so dH is -.
Answered by Maddy
-14.5
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