Movable piston

A cylinder with a movable piston records a volume of 12.6 L when 3.0 mol of oxygen isadded The gas in die cylinder has a pressure of 5.83 atm. The cylinder develops a leak and the volume of die gas is now recorded to be 12.1 L at the same pressure. How many moles of oxygen are lost ... 

Consider a vessel with a movable piston. A reaction takes place in the vessel at constant pressure and a temperature of200 K. When reaction is complete, the pressure remains the same and the volume and temperature double. Which of the following balanced equations best describes the reaction ... 

Sketch a cylinder with ten molecules of helium (He) gas. The cylinder has a movable piston. Label this sketch before. Make an after sketch to represent... 

Consider the following reaction in a vessel with a movable piston. 

Draw a cylinder with a movable piston containing six molecules of a liquid. A pressure of 1 atm is exerted on the piston. Next draw the same cylinder after the liquid has been vaporized. A pressure of one atmosphere is still exerted on the pistoa Is work done on the system or by the system ... 

Consider a sealed flask with a movable piston that contains 5.25 L of 02 saturated with water vapor at 25°C. The piston is depressed at constant temperature so that the gas is compressed to a volume of 2.00 L. (Use the table in Appendix 1 for the vapor pressure of water at various temperatures.)... 

A finely powdered solid sample of an osmium oxide (which melts at 40. °C and boils at 130.°C) with a mass of 1.509 g is placed into a cylinder with a movable piston that can expand against the atmospheric pressure of 745 Torr. Assume that the amount of residual air initially present in the cylinder is negligible. When the sample is heated to 200.°C, it is completely vaporized and the volume of the cylinder expands by 235 mL. What is the molar mass of the oxide Assuming that the oxide is OsOv, find the value of x. 

C05-0066. A cylinder with a movable piston contains a sample of gas. Describe in molecular terms the effect on pressure exerted by the gas for each of the following changes (a) The piston is pushed in. (b) Some gas is removed while the piston is held in place, (c) The gas is heated while the piston is held in place. 

Liquids are usually stored in bulk in vertical cylindrical steel tanks. Fixed and floating-roof tanks are used. In a floating-roof tank a movable piston floats on the surface of the liquid and is sealed to the tank walls. Floating-roof tanks are used to eliminate evaporation losses and, for flammable liquids, to obviate the need for inert gas blanketing to prevent an explosive mixture forming above the liquid, as would be the situation with a fixed-roof tank. 

Fig. 11 and 12. Figure 13 illustrates the basic dosator principle, which has been previously described [54,55]. The dosator consists of a cylindrical dosing tube fitted with a movable piston. The end of the tube is open and the position of the piston is preset to a particular height to define a volume (again,... 

Hydrogen gas and iodine gas are introdnced into a cylinder with a movable piston as shown in the following diagram ... 

Gas is heated within a sealed cylinder. The heat causes the gas to expand, pushing a movable piston outward to increase the volume of the cylinder to 4.63 L. 

Correct column packing is obtained by using preparative columns equipped with dynamic axial compression (DAC) technology [10, 11]. The column includes a movable piston attached to a hydraulic jack. The piston is used to pack and unpack the column and to maintain the stationary phase under dynamic compression, ensuring perfect particle stacking (Figure 12.5) and bed stability through time. 

If the reaction takes place inside a container outfitted with a movable piston, the greater volume of gas in the product will force the piston outward against the pressure of the atmosphere (P), moving air molecules aside and thereby doing work (Figure 8.4). 

A reaction is carried out in a cylinder fitted with a movable piston, as shown here. The starting volume is V = 5.00 L, and the apparatus is held at constant temperature and pressure. Assuming that AH = —35.0 kj and AE = —34.8 kj, redraw the piston to show its position after reaction. Does V increase, decrease, or remain the same ... 

Imagine that you have a sample of gas inside a cylinder with a movable piston at one end (Figure 9.5). What would happen if you were to decrease the volume of the gas by pushing the piston partway down Experience tells you that you would feel a resistance to pushing the piston because the pressure of the gas in the cylinder would increase. According to Boyle s law, the volume of a fixed amount of gas at a constant temperature varies inversely with its pressure. If the gas pressure is halved, the gas volume doubles if the pressure is doubled, the volume is halved. 

Imagine that you have two more gas samples inside cylinders with movable pistons (Figure 9.9). One cylinder contains 1 mol of a gas and the other cylinder contains 2 mol of the gas at the same temperature and pressure as the first. Common sense says that the gas in the second cylinder will have twice the volume of the gas in the first cylinder because there is twice as much of it. According to Avogadro s law, the volume of an ideal gas at a fixed pressure and temperature depends on its molar amount. If the amount of the gas is halved, the gas volume is halved if the amount is doubled, the volume is doubled. 

Show the approximate level of the movable piston in drawings (a) and (b) after the indicated changes have been made to the initial gas sample. 

Assume that you have a cylinder with a movable piston. What would happen to the gas pressure inside the cylinder if you were to do the following ... 

Consider the reaction H2(g) + Fly) — 2 HI(g). The reaction of a fixed amount of H2 and I2 is studied in a cylinder fitted with a movable piston. Indicate the effect of each of the following changes on the rate of the reaction ... 

A 0.500 L reaction vessel equipped with a movable piston is filled completely with a 3.00% aqueous solution of hydrogen peroxide. The H202 decomposes to water and 02 gas in a first-order reaction that has a half-life of 10.7 h. As the reaction proceeds, the gas formed pushes the piston against a constant external atmospheric pressure of 738 mm Hg. Calculate the PV work done (in joules) after a reaction time of 4.02 h. (You may assume that the density of the solution is 1.00 g/mL and that the temperature of the system is maintained at 20°C.)... 

Fig. 16. Schematic diagram of cold-hearth arc-melting furnace with movable piston.

Ten liters of hydrogen under 1 atm pressure are contained in a cylinder which has a movable piston. The piston is moved in until the same mass of gas occupies 2 L with no temperature change. Find the pressure in the cylinder. 

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