DATREND Systems venTest, Руководство по эксплуатации

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venTest OPERATORS MANUAL
b) The container's walls are rigid:
Volume cannot expand (V1=V2=V), pressure changes (P1 to P2). The gas law can now be
transformed:
P1 x V1 P2 x V2
T1 T2
leads to
º
P1 P2
T1 T2
Result: P2 =
P1 x T2
T1
In our case: P2 = 1 bar * 303.2/293.2 = 1.034 bar
Example: At a temperature of 20°C and a pressure of 1 bar a gas
takes up a volume of 1 l. Now ambient pressure is going to be
increased from 1bar to 1.1.bar.
a) The container's walls are flexible:
Volume can expand (V1 to V2), temperature remains the same (T1=T2=T). The gas law
can now be adapted as follows:
P1 x V1 P2 x V2
T1 T2
leads to
º
P1 x V1 = P2 x V2
Result: V2 =
V1 x P1
P2
In our case V2 = 1 Liter * 1/1.1 = 0.909 Liter
b) The container's walls are rigid: A modification of ambient pressure therefore cannot affect
gas pressure.
Appendix A
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