Answer :
Answer:
303 kilo Joules is the quantity of heat is released.
Explanation:
Moles of NaOH = [tex]\frac{125 g}{40 g/mol}=3.125 mol[/tex]
[tex]NaOH+HCl\rightarrow NaCl+H_2O[/tex]
According to recation 1 mole of NaOh gives 1 Mole of water, then 3.125 moles of NaOH will give ;
[tex]\frac{1}{1}\times 3.125 mol=3.125 mol[/tex] of water
The heat of neutralization for the formation of water = -55.9 kJ/mol
Heat evolved on formation of 3.125 moles of water : Q
[tex]Q= 3.125 mol\times -55.9 kJ/mol=-175 kJ[/tex]
The heat of solvation for sodium hydroxide = -41.0 kJ/mole
Heat evolved by solvation of 3.125 moles of NaOH = Q'
[tex]Q'=3.125 mol\times -41.0 kJ=-128 kJ[/tex]
Total quantity of heat is released when NaOH and HCl are mixed:
Q + Q' = -175 kJ + (-128) kJ = -303 kJ
(negative sign indicates that energy released)
303 kilo Joules is the quantity of heat is released.