A 20 mol% LiCl/H₂O solution at 25°C is made by mixing a 25 mol% LiCl/H₂O solution at 25°C with chilled water at 5°C. What is the heat effect in joules per mole of final solution?

a) 225.0 J/mol
b) 250.0 J/mol
c) 275.0 J/mol
d) 300.0 J/mol