Answer : The enthalpy change of dissolution of is 54.3 kJ/mole
Explanation :
Heat released by the reaction = Heat absorbed by the calorimeter + Heat absorbed by the water
where,
q = heat released by the reaction
= heat absorbed by the calorimeter
= heat absorbed by the water
= specific heat of calorimeter =
= specific heat of water =
= mass of water = 107.70 g
= change in temperature =
Now put all the given values in the above formula, we get:
Now we have to calculate the enthalpy change of dissolution of
where,
= enthalpy change = ?
q = heat released = 1.1123 kJ
m = mass of = 2.84 g
Molar mass of = 138.55 g/mol
Therefore, the enthalpy change of dissolution of is 54.3 kJ/mole