Volkswagen Polo Service & Repair Manual: Physical Principles
| The four known states of water also apply to air
conditioning system refrigerants. |
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| When water is heated in a vessel (heat absorption), water
vapor can be seen to rise. If the vapor is further heated
through heat absorption, the visible vapor turns into invisible
gas. The process is reversible. The warmth is extracted from
gaseous water, vapor forms first, then water and then ice. |
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Heat Transfer
| Every substance consists of a mass of moving molecules. The
fast moving molecules of a warmer substance give off some of
their energy to the cooler and thus slower molecules. As a
result, the molecular motion of the warmer substance slows down
and that of the colder substance is accelerated. This process
continues until the molecules of both substances are moving at
the same speed. They are then at the same temperature and no
further heat exchange takes place. |
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The boiling point given in tables for a liquid is always
referenced to an atmospheric pressure of 1 bar (14.5 psi). If
the pressure acting on a fluid changes, its boi ...
Other materials:
A/C Evaporator Temperature Switch -E33
Function:
The A/C Evaporator Temperature Switch -E33- determines the
temperature between the evaporator cooling fans. It prevents the
possibility of ice building up between the evaporator cooling
fans because the current entry to the con ...
AGM Battery, Checking
Perform Battery Checks in the Following Sequence:
1.
Visual inspection. Refer to
→ Chapter „Visual Inspection“.
2.
Check the battery using the Battery Tester -VAS6161-. Refer
to
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Types of front passenger front airbag system
First read and observe the introductory information
and safety warnings
Volkswagen offers two different front
airbag systems for front passengers:
A
B
Features of the front passenger front airbag that can only be switched
off by a qualif ...
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Pressure and Boiling Point