What is the balance equation for i2 (s) dissolving in water

I₂ + H₂O → HI + HIO

Explanation:

Iodine is not fully dissolve in water but only dissolve up to some extent.

When iodine was mixed with water it give mixture of two products.

So the balance reaction is as under

        I₂ + H₂O → HI + HIO

All the reactant are one mole and one one mole of each product produced in the shown reaction.

This is a reversible reaction and only 0.05% of Iodine molecule react with water and the other  Iodine molecule remain in water unreacted.

answer : third trial had the contaminated sample and the correct value for dhrxn should be 1000 kj/mol

explanation :

let us write down the given equations

equation 1 :

equation 2 :

equation 3 :

let us use hess's law to find out which 2 equations can be added to get the third equation.

let us reverse equation 2 and multiply it by 2. the new equation that we get is,

equation 4 :

let us add equation 1 & 4

the above equation is similar to equation 3 but has different value for dhrxn.

therefore third trial had the contaminated sample and the correct value for dhrxn should be 1000 kj/mol