The Standard Enthalpy of Formation of RbF(s)is -557

Multiple Choice

The standard enthalpy of formation of RbF(s) is -557.7kJ/mol and the standard enthalpy of formation of RbF(aq,1 m) is -583.8 kJ/mol.Determine the enthalpy of solution of RbF and indicate whether the solution temperature will increase or decrease when RbF is dissolved in water.

A) -26.1 kJ/mol; increase
B) 26.1 kJ/mol; increase
C) -26.1 kJ/mol; decrease
D) +1141.5 kJ/mol; increase
E) -1141.5 kJ/mol; decrease