To calculate the amount of heat released when 25 g of NaCl is crystallized, we can use the formula:q = m Hwhere q is the heat released, m is the mass of NaCl, and H is the heat of crystallization.Given:m = 25 g mass of NaCl H = -788 J/g heat of crystallization of NaCl Now, plug in the values:q = 25 g -788 J/g q = -19700 JThe amount of heat released when 25 g of NaCl is crystallized from a solution at its saturation point is -19,700 J. The negative sign indicates that the heat is released exothermic process .