Question

Using the data in the check your learning section of Example 5.5, calculate NaCl(aq)+AgNO₃(aq)→AgCl(s)+NaNO₃(aq).

a) −65.45kJ/mol
b) 65.45kJ/mol
c) −130.90kJ/mol
d) 130.90kJ/mol

Answer 1

The enthalpy change for the reaction NaCl(aq) + AgNO3(aq) → AgCl(s) + NaNO3(aq) can be calculated using the enthalpy changes of formation of the products and reactants. The enthalpy change is -65.45 kJ/mol.

Step-by-step explanation:

The enthalpy change for the reaction NaCl(aq) + AgNO₃(aq) → AgCl(s) + NaNO₃(aq) can be calculated using the enthalpy changes of the formation of NaCl, AgNO₃, AgCl, and NaNO₃. The enthalpy change for the reaction is equal to the sum of the enthalpy changes of formation of the products minus the sum of the enthalpy changes of formation of the reactants. In this case, it would be the enthalpy change of formation of AgCl minus the enthalpy change of formation of NaCl and AgNO₃. The enthalpy change of formation of NaCl and AgNO₃ can be found in the Check Your Learning section of Example 5.5 in the provided information. By substituting the values into the equation, we get -65.45 kJ/mol. Therefore, the correct answer is option a) -65.45 kJ/mol.