Is isopropyl alcohol a heterogeneous or homogeneous mixture

Explanation:

A mixture in which all the solute particles distribute uniformly into the solvent is known as a homogeneous mixture.

A homogeneous mixture is a clear solution with no solute particles seen in it.

For example, isopropyl alcohol is a clear solution. Hence, it is a homogeneous mixture.

On the other hand, a heterogeneous mixture is defined as the mixture in which solute particles are not uniformly distributed into the solvent.

For example, sand dissolved in water is a heterogeneous mixture.

Thus, we can conclude that isopropyl alcohol is a homogeneous mixture.

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