Answer:
-11.4 kJ of heat are released
Explanation:
Balanced reaction-
According to balanced equation, 1 mol of HCl is neutralized by 1 mol of NaOH.
So, 200 mL of 1 M HCl will be completely neutralized by 200 mL of 1 M NaOH.
Let's assume both HCl and NaOH solutions have densities equal to density of pure water.
We know, density = (mass)/(volume)
Density of pure water = 1 g/mL
So mass of both solutions = = 200 g
So, mass of mixture = (200+200) g = 400 g
Hence, Amount of heat released =
Where, m represents mass, C represents heat capacity and represents change in temperature
Let's assume that heat capacity of mixture is also equal to heat capacity of water.
Heat capacity of water = 4.186 J/(g.)
So, amount of heat released = = J=11.4 kJ
As acid-base neutralization reactions are exothermic therefore-
Heat released = -11.4 kJ