liquid gas Pressure – continual bombardment on the walls of a container by gas molecules in rapid, random motion Two units used to measure pressure: 1. millimeters of mercury (mm Hg) 2. atmospheres (atm) 1 atm = 760 mm Hg barometer – instrument used to measure atmospheric pressure manometer – instrument used to measure pressure of a gas in a container Boyle’s Law – for a fixed mass of an ideal gas at constant
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temperature and pressure is compressed to 473 mL. What is the new pressure of the gas? 2) In a thermonuclear device, the pressure of 0.050 liters of gas within the bomb casing reaches 4.0 x 106 atm. When the bomb casing is destroyed by the explosion, the gas is released into the atmosphere where it reaches a pressure of 1.00 atm. What is the volume of the gas after the explosion? 3) Synthetic diamonds can be manufactured at pressures of 6.00 x 104 atm
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grow your own samples for Weak Localization measurements if you choose. 2 Pressure and gas flow In vacuum work, pressures are almost always measured in millimeters of mercury, or torr. One torr is just the pressure necessary to support a column of mercury with a height of one millimeter. The conversion to units more familiar to readers of physics textbooks is 1atmosphere = 101kPa = 760torr There are two pressure regimes of interest to the scientist working with vacuum systems, and gases behave
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Ship docking for re-fit CLIPS> (Outer doors down-inner doors up) (Outer doors working yes) (Inner doors working no) => (Doors working ok) => (Outer doors working no) (Inner doors working no) => (Doors not working then (check water pressure then (check door rest))) => (Doors still not working then (abandon docking)) CLIPS> (Outer doors down-inner doors up) (Outer doors working yes) (Inner doors working yes) => (Doors working ok then (flooding doors)) => (Both flooding
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specific work output was needed with constant compressor pressure ratios of 6, 9, 12, and 15; while the turbine inlet temperatures were 800ºC, 1000ºC, 1200ºC, and 1400ºC. Then, the turbine inlet temperatures remained constant at 800ºC, 1000ºC, 1200ºC, and 1400ºC; while the compressor pressure ratios was 6, 9, 12, and 15. After all data was collected, four graphs were to be created by plotting the turbine inlet temperatures and the compressor pressure ratio versus the cycle thermal efficiency and net specific
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so that the gas pressure remained the same. Calculate the mass of helium added to the cylinder if the volume was changed from 2.50 L to 3.70 L. (Ans: 1.44 g) 2. An ideal gas in a 2.08 L container exerts a pressure of 1.00 atm at 0 °C. Determine the required change in temperature to adjust the pressure of gas to 1.65 atm after it has been transferred to a 1.50 L container. (Ans: 51.88) 3. (a) A 10.73 g sample of PCl5 is placed in a 4.00 L flask at 200 °C. Calculate the pressure of the flask. (Ans:
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04/12/02 57:020 Mechanics of Fluids and Transfer Processes Laboratory Experiment #3 Measurement of Pressure Distribution and Lift for an Airfoil Purpose The objectives of the experiment are to examine the surface pressure distribution and to compute the lift force acting on the airfoil. Test Design A body immersed in a flowing fluid is exposed to both pressure and viscous forces. The sum of the forces that acts normal to the free-stream direction is the lift, and the sum that acts
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saturated liquid refrigerant-134a. The piston is free to move, and its mass is such that it maintains a pressure of 900 kPa on the refrigerant. The refrigerant is now heated until its temperature rises to 70oC. Calculate the work done during this process. The freely-moving piston can be interpreted as giving a constant pressure process such that P1 = P2 = P = 900 kPa. For a constant pressure process, the concept that the work is the area under the path is particularly simple. That area is a
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the states of matter, will mix evenly/completely when confined in the same container, lower densities than liquids and solids. 5.2: Pressure of A Gas Gas molecules are constantly in motion, causing them to exert pressure with the surfaces they come in contact with. Pressure is known as the most readily measurable properties of a gas. SI Units of Pressure • Velocity is the change in distance with elapsed time. It uses the unit m/s or cm/s • Velocity = distance moved/elapsed time • Acceleration
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molecules are in 1 atm of gas? (There are 6.022 * 10^23 molecules/mole) 5. Even though the number of molecules in 1 atm of gas at constant pressure and temperature is identical, the number of atoms in the gas at STP can vary depending on the gas. How many atoms are there in one mole of methane (CH4) 6. In this experiment, the pressure (P) was 1 atm, the temperature (T) was 295 K, the volume (V) was 0.150 L, and the number of moles (n)was 6.2 * 10^-3 moles. The ideal gas law states
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