Arrange the following molecules (H2, H2O, F2) in order of i creasing strength of intermolecular forces

H2<F2<H2O

Explanation:

Intermolecular forces are the forces of attraction that hold molecules together in a particular state of matter.

The kind of intermolecular forces at work in a substance depends on the kind of bond between the atoms in the molecule.

H2 and F2 both have dispersion forces as the dominant intermolecular interaction in the molecule. However, since the extent of dispersion forces depends on the molecular mass of the substance, the extent of dispersion forces in F2 is greater than that of H2.

H20 in addition to dispersion forces also exhibits intermolecular hydrogen bonding which is a stronger intermolecular interaction than dispersion forces.

Hence, the order of increasing strength of intermolecular forces among the substances listed is;

H2<F2<H2O

no

explanation:

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answer: the enthalpy of the overall chemical reaction is +87.88 kj or +88 kj.

according to hess's law, the overall enthalpy of a reaction is the difference between the sum of enthalpy values of all the products and the sum of enthalpy values of all the reactants.

δh(reaction) = ∑nδh(products) - ∑nδh(reactants)

δh(reaction) = [δh +δh] - [δh]

δh(reaction) = [1(-287.02) + 1(0) ] - [1(-374.9)] kj = +87.88 kj

here, δh (pcl3) = -287.02 kj, δh(cl2) = 0, δh(pcl5) = -374.9 kj

therefore, enthalpy of the overall reaction is +87.88 kj or +88 kj.