The enthalpy of solution at infinite dilution of hydrogen chloride gas in water is -74.85 kJ / mol. What is the heat with drawn when15 moles of water are added to the solution that contains 1 mole of hydrogen chloride gas dissolved in 25 moles of water, therefore temperature of the new mixture remains same?

HCl(g) + 25 aq. $\to$ HCl.25 aq.   $\Delta H$= –72.03 kJ/mol
HCl(g) + 10 aq. $\to$HCl.10 aq.  $\Delta H$= –69.01 kJ/mol
HCl(g) + 40 aq.$\to$ HCl.40 aq.  $\Delta H$= –72.79 kJ/mol