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

question 48

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

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