Question

Calculate the enthalpy of solution of sodium chloride (NaCl) when 10 grams of NaCl is dissolved in 100 mL of water assuming that the specific heat capacity of the solution is equal to the specific heat capacity of water (4.18 J/g°C) and the temperature change is negligible.

Answer 1

To calculate the enthalpy of solution of sodium chloride  NaCl , we need to know the heat of solution  Hsol  for NaCl. The heat of solution is the amount of heat absorbed or released when a solute dissolves in a solvent. Unfortunately, the information provided does not include the heat of solution for NaCl. However, if we assume that the heat of solution for NaCl is given, we can calculate the enthalpy change for dissolving 10 grams of NaCl in 100 mL of water using the following formula:H =  mass of NaCl    Hsol per mole of NaCl  /  molar mass of NaCl First, we need to find the molar mass of NaCl:Na = 22.99 g/molCl = 35.45 g/molMolar mass of NaCl = 22.99 + 35.45 = 58.44 g/molNow, let's assume the heat of solution for NaCl is given as X J/mol. We can now calculate the enthalpy change for dissolving 10 grams of NaCl:H =  10 g    X J/mol  /  58.44 g/mol H =  10X  / 58.44 JWithout the heat of solution value  X , we cannot provide a numerical answer for the enthalpy of solution of sodium chloride in this case.