During the formation of aqueous solution of any electrolyte:
Correct answer: C. Heat may be evolved or absorbed
- A. Heat is evolved
- B. Heat is absorbed
- C. Heat may be evolved or absorbed
- D. Electrolyte does not dissolve in water
Explanation
A solution is a homogeneous mixture of two or more substances and can either be in the gas phase, the liquid phase, or the solid phase. The enthalpy change of solution refers to the amount of heat that is released or absorbed during the dissolving process (at constant pressure). This enthalpy of solution can either be positive (endothermic) or negative (exothermic). The heat may be evolved or absorbed during the formation of aqueous solution of electrolytes and it completely depends upon their behaviour and properties of electrolytes being used.
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About Thermochemistry and Energetics of Chemical Reactions
Thermochemistry measures energy changes in chemical reactions and distinguishes exothermic from endothermic processes. Work covers systems, surroundings and state functions, internal energy, the first law of thermodynamics, enthalpy and Hess's law, including the sign conventions used when heat enters or leaves a system.
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