6.3 Intermolecular Forces HW

A liquid evaporates fast.

The liquid is said to have ________ volatility.

• high

• medium

• low

• none of these

A liquid has low volatility.

The intermolecular forces between molecules in this liquid must be________

• strong

• medium

• weak

• none of these

A liquid flows very slowly.

The term that describes this observation is...

• high volatility

• low volatility

• high viscosity

• low viscosity

A liquid allows a marble to fall to the bottom very quickly.

The intermolecular forces within the liquid must be _____.

• strong

• medium

• weak

• none of these

Solids X and Y are heated:

X melts at 175˚C.

Y melts at 800˚C

This is evidence that ...

• X has stronger intermolecular forces than Y

• Y has stronger intermolecular forces than X

• X and Y both melt so their intermolecular forces are the same.

• X and Y don't have intermolecular forces because they melted.

Tags

NGSS.MS-PS1-4

A substance can remain in the gas phase all the way down to –150˚C before becoming a liquid. The intermolecular forces between particles in this substance are ____.

• strong

• medium

• weak

• zero

Tags

NGSS.HS-PS3-4

A scientist invents a new molecule that she suspects will have strong intermolecular forces.

a) What are THREE tests/experiments she could do to test this hypothesis?

b) What results should she expect from each test?

DEEPER THINKING

Which pair of properties CANNOT go together in a single substance?

• high boiling point and high viscosity

• high volatility and low boiling point

• low viscosity and low volatility

• high boiling point and high volatility

Which is the most likely thing to be observed when a red polar liquid and yellow nonpolar liquid are poured into a single container?

• a uniform orange liquid

• a red layer and a yellow layer

• a colorless layer and an orange layer

• three layers: red, orange, and yellow

Tags

NGSS.MS-PS1-2

Wax is a nonpolar solid.

Hexane is a nonpolar liquid.

Will wax dissolve in hexane?

• YES because they are both nonpolar

• YES because their names both contain an "x"

• NO because at least one substance has to be polar to dissolve.

• NO because solids can't dissolve in liquids.