Question

Heat of solution for NaCl is
A. High
B low.
C Zero
D one

Answer 1

Answer:

Option B low is the correct answer.

So, when 1 mole of sodium chloride crystals are dissolved in an excess of water, the enthalpy change of solution is found to be +3.9 kJ mol-1. The change is slightly endothermic, and so the temperature of the solution will be slightly lower than that of the original water.

Answer 2

The correct option is B low.

Heat of solution for NaCl is low.

• The chemical name of NaCl is sodium chloride. In solution it breaks down as sodium and chloride ions.
• When NaCl dissolves in water then the enthalpy of the solution decreases and reaction of NaCl with water is endothermic in nature so, heat has to be added in solution. Thus NaCl solution posses low heat than normal water.