The dissociation of sulfurous acid (h2so3) in aqueous solution occurs as follows:
h2so3 > h+ + hso3-
hso3- > h+ + so32-
if .50 moles of sulfurous acid are dissolved to form a 1 l solution, which of the following concentrations will be least at equilibrium?
(d) liquid is being formed.
the enthalpy of fusion of a substance (–hfus) is the change in its enthalpy when the substance changes its state from a solid to a liquid. it happens when heat is supplied to some quantity of substance which is originally in solid state & it turns into liquid.
example- melting of ice.
to melt ice energy is required. approximately, 333 kj of energy is needed to heat 1 kg ice to convert into liquid.
the correct answer is d.