Problem 72

Given information

The lattice energy of sodium hydroxide is .

The heat of hydration of the solution is .

The mass of sodium hydroxide in solution is .

The initial temperature of solution is .

The final temperature of solution is .

The heat capacity of the solution is .

The density of the solution is .

Step-by-step explanation

The enthalpy change of the given solution is calculated by the formula,

(considered as equation 1)

Where,

• is the enthalpy change of solution.

• is the heat of hydration of solution.

• is the lattice energy.

The enthalpy change of the reaction is calculated by using the formula,

(considered as equation 2)

Where,

• is the enthalpy change of the reaction.

• is the specific heat capacity of solution.

• is the mass of solution.

• is the initial temperature of the reaction.

• is the final temperature of the reaction.

• is the number of moles of reactant.