Ammonium nitrate (nh4no3) dissolves readily in water even though the dissolution is endothermic by 26.4 kj/mol. the solution process is spontaneous because
a. of the increase in disorder upon dissolution of this strong electrolyte
b. osmotic properties predict this behavior
c. of the increase in enthalpy upon dissolution of this strong electrolyte
d. the vapor pressure of the water decreases upon addition of the solute
e. of the decrease in enthalpy upon addition of the solute

A.

Explanation:

For a process that occurs at constant temperature and pressure, spontaneity can be determined using the change in Gibbs free energy, which is given by:

ΔG = ΔH - TΔS. A process is spontaneous if ΔG≤O.

Even so the enthapy of the dissolution is positive the factor -TΔS will produce a negative ΔG  value. As ΔS is relatived to the disorder of a system, a increase in this value (ΔS ) upon dissolution will made the dissolution process spontaneous.

answer: enthalpy

explanation:

for a exothermic reaction, the energy is released i.e. the energy of the products is lower than the energy of the reactants.

= enthaply

= energy of products

= energy of reactants

as , thus comes out to be negative. negative value of enthalpy shows that the reaction is exothermic.

b is the correct answer

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