Answer : The final temperature of the solution in the calorimeter is, 
Explanation :
First we have to calculate the heat produced.

where,
 = enthalpy change = -44.5 kJ/mol
 = enthalpy change = -44.5 kJ/mol
q = heat released = ?
m = mass of  = 1.52 g
 = 1.52 g
Molar mass of  = 40 g/mol
 = 40 g/mol

Now put all the given values in the above formula, we get:


Now we have to calculate the final temperature of solution in the calorimeter.

where,
q = heat produced = 1.691 kJ = 1691 J
m = mass of solution = 1.52 + 35.5 = 37.02 g
c = specific heat capacity of water = 
 = initial temperature =
 = initial temperature = 
 = final temperature = ?
 = final temperature = ?
Now put all the given values in the above formula, we get:


Thus, the final temperature of the solution in the calorimeter is, 