Properties of Liquids and Solids and Phase Changes

What is the intermolecular force that exist on the following interaction of two carbon dioxide molecules?

• London Dispersion Forces

• Dipole Dipole Forces

• Ion-Induced Dipole

• Hydrogen Bonding

Which of the following states the incorrect explanation of Dispersion Forces?

• It usually increases with molar mass because molecules with larger molar mass tend to have more electrons

• It increases in strength with the number of electrons

• It is strongest when at high temperatures and induced atomic speeds likened to condensed He atoms.

• It is the only attractive intermolecular forces present on all nonpolar molecules

True or False:

The larger the dipole moment, the greater the intermolecular force.

• TRUE

• MAYBE

• FALSE

• NEXT QUESTION PLEASE

ANSWER IN ALL CAPS.

The strength of a HYDROGEN BOND is determined by the coulombic interaction between the **** ***** of the electronegative atom and the hydrogen nucleus.

(a)  

There is a tendency where you can make a copper or a 25 centavo coin float on water. What property of liquids is being applied in the situation?

• surface tension

• cohesion

• adhesion

• viscosity

ANSWER IN ALL CAPS ONLY.

Water has a considerably greater surface tension than other liquids because of what intermolecular forces?

(a)  

What is caused by the combination of cohesive forces of the liquid and the adhesive forces between the liquid and tube material? Also, this is the main cause of rising dye on paper on a makeshift chromatography.

• surface tension

• capillary action

• viscosity

• heat of vaporization

Which of the following liquids has the highest viscosity at 20 degrees Celsius?

• Glycerol C₃O₈O₃

• Acetone C₃H₆O

• Diethyl ether C₂H₅OC₂H₅

• Blood

In reading the temperature, the convex meniscus of the mercury is being used as the basis. What force dominates along the glass tube?

• adhesive forces

• cohesive forces

• viscous forces

• tensive forces

Which of the following states a FAKE concept of VISCOSITY?

• The viscosity of the liquid usually decreases when temperature increases

• Liquids that have strong intermolecular forces have higher viscosities than those that have weak intermolecular forces

• The greater the viscosity, the faster the liquid flows

• It is a measure of a liquid's resistance to flow