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# Barometer Mercury Eudiometer by yre19594

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• pg 1
```									    Barometer                                          Mercury Eudiometer
1.       2.        3.

The normal                                                    Patm = 760mm Hg
H2
pressure due to
the atmosphere                                                Pgas1 = 760mmHg
at sea level
can support a                                                 Pgas 2 = 760mm Hg -_____
column of
mercury that is                      50                       Pgas3 = 760mm Hg +_____
Hg
760 mm high                          mm

30
mm

Closed- end     Manometer                                               Open-end     Manometer

P gas= ______________                           Pgas = _________________           Pgas______________

ΔH                                                         ΔH
150                                                        130
ΔH                   mm                                                         mm
200
mm

Pgas < Patm                        Pgas > Patm
Pgas = Patm - ΔH                   Pgas = P atm + ΔH

Standard Temperature and Pressure- STP

P = 1 atmosphere = 760 torr = 101.3 kPa
T = 0°C= 273 Kelvin      Kelvin = C + 273 °C = Kelvin - 273
Gas law problems require that temperature be in KELVIN!
The standard molar volume of an ideal gas is 22.42 liters @ STP

```
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