What happens to these physical properties asthe strength of intermolecular force

Question

What happens to these physical properties asthe strength of intermolecular forces increases? Do they increase or decrease? melting point, vapor pressure, boiling point,viscosity,surface tension Substances with weak intermolecular forces tend tobe in the gas state at room temperature. Moderate intermolecularforces are required to liquefy or solidify a substance at roomtemperature. Classify the types of intermolecular forces asmoderate or weak. hydrogen bonding, london dispersion, ion-dipole,dipole-dipole What happens to these physical properties asthe strength of intermolecular forces increases? Do they increase or decrease? melting point, vapor pressure, boiling point,viscosity,surface tension Substances with weak intermolecular forces tend tobe in the gas state at room temperature. Moderate intermolecularforces are required to liquefy or solidify a substance at roomtemperature. Classify the types of intermolecular forces asmoderate or weak. hydrogen bonding, london dispersion, ion-dipole,dipole-dipole What happens to these physical properties asthe strength of intermolecular forces increases? Do they increase or decrease? melting point, vapor pressure, boiling point,viscosity,surface tension Substances with weak intermolecular forces tend tobe in the gas state at room temperature. Moderate intermolecularforces are required to liquefy or solidify a substance at roomtemperature. Classify the types of intermolecular forces asmoderate or weak. hydrogen bonding, london dispersion, ion-dipole,dipole-dipole What happens to these physical properties asthe strength of intermolecular forces increases? Do they increase or decrease? melting point, vapor pressure, boiling point,viscosity,surface tension Substances with weak intermolecular forces tend tobe in the gas state at room temperature. Moderate intermolecularforces are required to liquefy or solidify a substance at roomtemperature. Classify the types of intermolecular forces asmoderate or weak. hydrogen bonding, london dispersion, ion-dipole,dipole-dipole What happens to these physical properties asthe strength of intermolecular forces increases? Do they increase or decrease? melting point, vapor pressure, boiling point,viscosity,surface tension Substances with weak intermolecular forces tend tobe in the gas state at room temperature. Moderate intermolecularforces are required to liquefy or solidify a substance at roomtemperature. Classify the types of intermolecular forces asmoderate or weak. hydrogen bonding, london dispersion, ion-dipole,dipole-dipole What happens to these physical properties asthe strength of intermolecular forces increases? Do they increase or decrease? melting point, vapor pressure, boiling point,viscosity,surface tension Substances with weak intermolecular forces tend tobe in the gas state at room temperature. Moderate intermolecularforces are required to liquefy or solidify a substance at roomtemperature. Classify the types of intermolecular forces asmoderate or weak. hydrogen bonding, london dispersion, ion-dipole,dipole-dipole What happens to these physical properties asthe strength of intermolecular forces increases? Do they increase or decrease? melting point, vapor pressure, boiling point,viscosity,surface tension Substances with weak intermolecular forces tend tobe in the gas state at room temperature. Moderate intermolecularforces are required to liquefy or solidify a substance at roomtemperature. Classify the types of intermolecular forces asmoderate or weak. hydrogen bonding, london dispersion, ion-dipole,dipole-dipole What happens to these physical properties asthe strength of intermolecular forces increases? Do they increase or decrease? melting point, vapor pressure, boiling point,viscosity,surface tension Substances with weak intermolecular forces tend tobe in the gas state at room temperature. Moderate intermolecularforces are required to liquefy or solidify a substance at roomtemperature. Classify the types of intermolecular forces asmoderate or weak. hydrogen bonding, london dispersion, ion-dipole,dipole-dipole What happens to these physical properties asthe strength of intermolecular forces increases? Do they increase or decrease? melting point, vapor pressure, boiling point,viscosity,surface tension Substances with weak intermolecular forces tend tobe in the gas state at room temperature. Moderate intermolecularforces are required to liquefy or solidify a substance at roomtemperature. Classify the types of intermolecular forces asmoderate or weak. hydrogen bonding, london dispersion, ion-dipole,dipole-dipole What happens to these physical properties asthe strength of intermolecular forces increases? Do they increase or decrease? melting point, vapor pressure, boiling point,viscosity,surface tension Substances with weak intermolecular forces tend tobe in the gas state at room temperature. Moderate intermolecularforces are required to liquefy or solidify a substance at roomtemperature. Classify the types of intermolecular forces asmoderate or weak. hydrogen bonding, london dispersion, ion-dipole,dipole-dipole What happens to these physical properties asthe strength of intermolecular forces increases? Do they increase or decrease? melting point, vapor pressure, boiling point,viscosity,surface tension Substances with weak intermolecular forces tend tobe in the gas state at room temperature. Moderate intermolecularforces are required to liquefy or solidify a substance at roomtemperature. Classify the types of intermolecular forces asmoderate or weak. hydrogen bonding, london dispersion, ion-dipole,dipole-dipole What happens to these physical properties asthe strength of intermolecular forces increases? Do they increase or decrease? What happens to these physical properties asthe strength of intermolecular forces increases? melting point, vapor pressure, boiling point,viscosity,surface tension Substances with weak intermolecular forces tend tobe in the gas state at room temperature. Moderate intermolecularforces are required to liquefy or solidify a substance at roomtemperature. Classify the types of intermolecular forces asmoderate or weak. hydrogen bonding, london dispersion, ion-dipole,dipole-dipole

Explanation / Answer

What happens to these physical properties asthe strength of intermolecular forces increases? Do they increaseor decrease? What happens to these physical properties asthe strength of intermolecular forces increases? Do they increaseor decrease? melting point, vapor pressure, boiling point,viscosity,surface tension (a)Melting point : ----------------- For a substance to melt, kinetic forces(increased by increasing temperature) must overcome theintermolecular forces keeping the particles in a fixed position.Therefore higher temperatures are needed to overcome strongerintermolecular forces. In other words, the stronger theintermolecular force, the higher the meltingpoint.

(b)Vapour pressure : -------------------- Vapor pressure is determined by thenumber of molecules that can escape from the surface of a liquid.More molecules can escape if the force of attraction, which holdsthe molecules together, is weak
(c)Boiling point : ----------------- Boiling points are always higher thanmelting points for any one substance. The method for rankingdifferent substances is the same as that for melting points.Substances with stronger intermolecular forces require highertemperatures to escape that attraction and become a gas (boil).So,the stronger the intermolecular force, thehigher the boiling point.


(d) &(e) Viscosity & Surface tension   : -------------------------------------- Like vapor pressure, viscosity and surfacetension depend on both the temperature and the intermolecularforces of the substance. Increasing temperature decreases both theviscosity and the surface tension. At any given temperature, thesubstance with stronger intermolecular forces hasgreater viscosity and higher surfacetension.
1) hydrogen bonding------- Moderate
2)London dispersion ------ Weak 3)ion-dipoole       -------- Moderate
4)dipole-dipole     -------- Weak

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