In dilute solution the heat of the reaction NaOH + HCl = NaCl + H2O is – 57.3kJ. Therefore the heat of the reaction 2NaOH + H2SO4 (to) Na2SO4 + 2H2O is
-
A.
+ 28.65 kJ -
B.
– 28.65KJ -
C.
+ 57.3KJ -
D.
– 114.6 KJ -
E.
– 229.2 KJ
Correct Answer: Option D
Explanation
NaOH + HCl = NaCl + H2O (Delta)H = -57.3kJ
Heat of reaction of 2NaOH + H2O4
NaSO4 + H2O is
= 57.3 x 2 = -114.6 kJ