Question

In a calorimetry experiment, a salt is dissolved in water within an insulating container. The temperature of the solution (surroundings) decreases from 25°C to 14°C. Given that the mass of the solution is 120 g, and the specific heat of the solution is 3.18 J/g°C, calculate the enthalpy change (in kJ) for the dissolving process. Be sure to give the correct sign for your answer, and identify the dissolving process as endothermic or exothermic. Group of answer choices

Answer 1

Step-by-step explanation:

heat released by the solution

= 120 x 3.18 x ( 25 - 14 )

= 4197.6 J

= 4.1976 kJ

This is the heat gain by the salt

so enthalpy change = + 4.1976 kJ

because there is increase in enthalpy

It is endothermic process .