Experiment 3 – Surface Tension Measurements by Capillary Rise Method
1.
It is due to the cohesive forces between the liquid molecules. See Answer
2.
A property of water wherein water is attracted to water. See Answer
3.
A property of water wherein water is attracted to other substances. See Answer
4.
An object _____ because of the high surface tension of the water. See Answer
5.
For surface tension, the ______ between molecules down into a liquid are shared with all
neighboring atoms. See Answer
6.
T/F: For surface tension, those on the surface have neighboring atoms above, and exhibit stronger
attractive forces upon their nearest neighbors on or below the surface. See Answer
7.
A property of the surface of the liquid that allows it to resist an external force. See Answer
8.
For a molecule on the surface of the liquid, there will be a ______ since there will be no attractive
force acting from above. See Answer
9.
T/F: The inward force, in surface tension, causes the molecule on the surface to contract and to
resist being stretched or broken. That’s why the surface is under tension. See Answer
10.
They will pack somewhat closer together than the rest of the molecules, in surface tension. And
they will be more ordered and resistant to molecular disruptions. Thus, the surface will seem to have a
‘’skin’’. See Answer
11.
It is the magnitude F of the force exerted parallel to the surface of the liquid divided by the length
L of the line over which the force acts. See Answer
12.
It is the ratio of the work done to the increase in surface area. See Answer
13.
Molecules in liquid state experience strong intermolecular attractive forces. When those forces
are between like molecules, they are referred to as ______. See Answer
14.
When attractive forces are between unlike molecules, they are said to be _____. See Answer
15.
Forces that hold a certain body of liquid together with minimum surface area. See Answer
16.
Forces that try to make a certain body of liquid to spread out. See Answer
17.
If cohesive forces are ______ than adhesive forces, then the body of water will maintain its shape.
See Answer
18.
If cohesive forces are ______ than adhesive forces, then the body of water will spread out. See
Answer
19.
Formula for force in terms of surface tension. See Answer
20.
What is the relationship of surface tension and temperature? See Answer
21.
Formula of surface tension (based on the experiment proper), in terms of the liquid’s density. See
Answer
22.
For Hg as a liquid involved in capillary rise method, the contact angle is ____. See Answer
23.
Surface tension decreases when temperature (a)________ because the cohesive forces
(b)_______ with an increase in molecular thermal activity. See Answer
24.
Another way to get surface tension wherein the surface tension of the liquid is related to the
weight of a drop of that liquid which falls freely from the end of the tube. See Answer
25.
Another way to get surface tension wherein the principle of the instrument depend on the fact
that the force necessary to detach a platinum ring immersed at the surface or interface is proportional
to the surface or interfacial tension. See Answer
26.
In using the ring detachment method, as the ring is pulled out of the liquid, the force required to
detach it from the liquid surface is precisely measured. What force is that? See Answer
27.
What is the relationship of surface active agents (S.A.A.)/surfactants to the surface tension? See
Answer
28.
Some of the water molecules at the interface are replaced by the ____ part of surfactant. See
Answer
29.
Attractive force between surfactant molecules (cohesive force) & between S.A.A. and water
(adhesive force) are _____than cohesive force between water molecules alone. See Answer