How Increase in Temperature Affects Viscosity of a Liquid Presented By:
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Introduction  Temperature is the numerical measure of cold and hot.  Measurement of temperature is done by detecting: o heat radiation o kinetic energy o particle velocity a o thermometric material behavior. o Temperature can be calibrated in different scales including
Kelvin, Fahrenheit and Celsius.
Viscosity Is the measure of the level of resistance to flow
of a liquid.
It is the stickiness and thickness of a liquid. It is determined through the time it takes to
flow through a viscometer tube.
Viscometer tube is the instrument that is used
in measuring viscosity.
Thermometer measures temperature.
Sample Example Viscosity of honey is higher than that of water
at room temperature.
This makes water to flow more freely as
compared to honey.
This due to honey’s high viscosity. This can be explained by the structure of the
two substances.
Molecular Explanation The molecular structure of honey is more
complex than that of water.
This gives honey higher viscosity. The molecular structure of water is simple. It comprises of oxygen and hydrogen bonds. Honey has complex bonds of sugars.
Temperature Effect Increase in temperature affects viscosity of a liquid. It is through impacting on its molecular structure. When temperatures are increased, the liquid is heated up. This excites the molecules and they start moving rapidly. Under normal circumstances atoms are the basic components
of any matter are always moving.
The atoms form the molecules of the liquid
and when heated.
They start moving faster than normal. Energy caused by increased temperature
makes the molecules move at a faster rate .
They overcome the binding forces of the
molecules.
This makes the liquid more fluid decreasing its
viscosity.
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