What is the enthalpy of solution of NaCl in kJ/mol?

ΔHf​[NaCl (s)]=−411.2kJ/mol ΔHf​[NaCl (aq)]=−407.3kJ/mol

Indicate whether this salt will become more soluble or less soluble as temperature increases.

ΔHsolution​=?
a. less soluble
b. more soluble