Torr unit

The atmospheric pressure in Denver, Colorado, is usually about 84.0 kPa. What is this pressure in atm and torr units ... 

Notice that we did not use SI units for all quantities, but that the torr unit canceled, so that the correct answer was obtained. 

Fig. 9. Time dependence of the thermodynamic functions in the limit of strong rotational coupling, p =50 torr. Units as in Fig. 8.

Torr Unit of pressure equal to one part in 760 of a standard atmosphere, also equal to the pressure at the bottom of a column of mercury 1 millimeter high with vacuum above it. 

The langmuir and torr units cancel the only remaining unit, seconds, is in the denominator of the denominator, which makes it in the numerator. Solving numerically ... 

At the outset, we were faced with the difficult decision whether to use the Angstrom unit or the nanometre for the dimensions of molecules. After careful consideration, we have come down firmly in favour of the Angstrom and we believe that this decision will meet with the approval of the majority of our readers. When quoting graphs and tables of data from the literature, we have retained the original units (kcal, Torr, C, tonin, etc.) in the belief that it is more reasonable to state the data in the form used by the original author—except where comparisons are being made between results presented in different units. 

In these unit conversions on H, we have used the facts that 1 atm = 760 Torr and the ratio of densities PHg/ soin - /Psoin t onverts from Torr to millimeters of solution. These numerical examples show that experiments in which Apj, ATf, or ATj, are measured are perfectly feasible for solutes of molecular weight 100, but call for unattainable sensitivity for polymeric solutes of M = 10 . By contrast, osmometry produces so much larger an effect that this method is awkward (at least for 1% concentration) for a low molecular weight solute, but is entirely feasible with the polymer. 

Pressure measurements are not often quoted in the text but the unit of Torr, where 1 Torr= 1 mmHg = 133.322 387 Pa, is a convenient practical unit and appears occasionally. 

John Eerris, Environmental Protection Agency Albert Ness, Rohm and Haas Company David Riggs, Anderson Development Company Robert Rosen, BASF Corporation Kevin Shaughnessy, The Dow Chemical Company Laszio Takaco, Occidental Chemical Corporation Anthony Thompson, Monsanto Company Anthony Torres, Eastman Kodak Company RickYabroff, United Agri Products, Inc. 

The torr i.s a unit of pre.s.snre named for Torricelli, inventor of die barometer. 1 torr corre-.spond.s to 1 mm Hg (l/760dr of an atmo.sphere). 

In this form, Alhas the units of torr.) The relationship defined by Equation (A15.4) plots as a hyperbola. That is, the MbOg saturation curve resembles an enzyme substrate saturation curve. For myoglobin, a partial pressure of 1 torr for jbOg is sufficient for half-saturation (Figure A15.1). We can define as the partial pressure of Og at which 50% of the myoglobin molecules have a molecule of Og bound (that is, F= 0.5), then... 

For reference, note that unit of vacuum measurement is the torr. 

Liquid height, ft = Non-condensable load factor = Latent heat of vaporization of steam, BTU/lb = Average mol weight of system vapors = Molecular weight of non-condensable gas = Molecular weight of condensable vapor = Total absolute pressure, Ibs/sq in. absolute (or other consistent units), or system operating pressure, torr... 

The pressure exerted by a column of mercury depends on its density, which varies slightly with temperature. To get around this ambiguity, the torr was defined to be the pressure exerted by 1 mm of mercury at certain specified conditions, notably 0°C. Over time, the unit torr has become a synonym for millimeter of mercury. Throughout this text, we will use millimeter of mercury rather than torr because the former has a clearer physical meaning. 

Fig. 92. Mass spectral parameters pressure (p in torr) and ionic currents (J in relative units) of Li2NbOF5 (A), Na2NbOFs (B) and K2NbOFs (C) versus temperature in °C (after Agulyansky et ah, [383]). Numbers on the curves correspond to ions as shown in Fig. 91.

Fig. 2. Pressure fall —AP (Torr) against time t (arbitrary units) in hydrogenation of acetylene on Pt/AhOa catalyst at 110°C and Pst/Pctnt 2. In the initial slow period of the reaction the main product is ethylene, and after the acceleration, further hydrogenation of ethylene to ethane predominates. From G. C. Bond and P. B. Wells, J. CaM. 4, 211 (1965).

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