Answer to Question #165422 in General Chemistry for Luelsegedkumsa

Question

the solubility of AgNO3 at 10°C and 20°C are 170 g and 222 g per 100 g.what is the sign of heat of solution for AgNO3 ?

Answer 1

The dissolution of AgNO₃ in water is represented by the equation:

AgNO_{3 (s)}$\implies$Ag⁺_(aq) + NO₃^-_(aq)

We can see from the question that as the temperature was increased from 10 ° to 20 °C the solubility of the solute increased from 170 g to 222 g per 100 g of H₂O.

This implies that the solubility of the solute increases with increase in temperature.

If a reaction moves in the forward direction when the temperature is increased, then the reaction is endothermic. If the reaction is endothermic, the sign of change of heat of solution is positive.

Answer: the sign of change of heat of solution is positive.