Concept explainers
(a)
Interpretation:
The observed manometer reading is to be calculated, if the manometer fluid is (i) mercury, (ii) water and the preferred manometer fluid is to be identified with an explanation.
Concept introduction:
For manometer fluid as mercury the net equation for pressure is written as,
For water the above equation is written as,
(b)
Interpretation:
An explanation for the working of system if toluene is used as manometer fluid is to be stated and several advantages of mercury fluid over toluene is to be stated
Concept introduction:
Manometer is a device used to measure pressure of gas or vapor at low levels. It is helpful in differentiating static and dynamic pressures. Its shape may be U-tube, inverted or a single tube.
(c)
Interpretation:
The purpose of nitrogen blanket to be stated.
Concept introduction:
Manometer is a device used to measure pressure of gas or vapor at low levels. It is helpful in differentiating static and dynamic pressures. Its shape may be U-tube, inverted or a single tube.
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Chapter 3 Solutions
EBK ELEMENTARY PRINCIPLES OF CHEMICAL P
- A 20-cu ft tank at 100 degrees F is pressured to 200 psia with a pure paraffin gas. Ten pounds of ethane are added, and the specific gravity of the gas mixture is measured to be 1.68. Assume that the gases act as ideal gases. What was the gas originally in the tank?arrow_forwardConsider the following reaction CS2(9) + 302(9) – CO2(9) + 2SO2(g) A mixture containing only CS2(g) and excess O2(g) at a total pressure of 100 kPa is placed in a sealed vessel. After the reaction is completed and the vessel is cooled to the initial temperature, the total pressure in the vessel drops to 80 kPa. What was the mole fraction of CS2(g) in the initial mixture? A. 0.80 B. 0.50 C. 0.20 D. 0.75 E. 0.25arrow_forwardSulfur dioxide (A) diffuses through a stagnant layer of air (B) of 2 cm thickness at 45oC and 1.2 bar total pressure. The partial pressures of SO2 on the two sides of the air layer are PA0 = 0.85 bar and PAL =0.15 bar, respectively. Considering Air is a non-diffusing component and DSO2-Air = 3.5×10-5 m2/sec, calculate: 1) The molar flux of SO2 with respect to an observer moving with the mass average velocity.arrow_forward
- Pressure (A) Explain the term pressure and state its S.I. unit. (B) Explain Henry’s law. (C)A bottle of H2 has just been received by the technicians in DkIT for use in the instrumentation lab. It is a 47 litre cylinder at a pressure of 50 atmospheres. The normal working pressures is 2 bar. (i) To what volume of gas will that equate at the working pressure? (ii) For how many hours will the gas last if it used at the rate of 0.5dm3 per hour? D)You see your best friend at the bar and you walk up behind her. You accidentally startle her and she takes a step backwards. Unfortunately, she is wearing high heels and her heels come down on your foot. She weighs only 55kg but the size of her heel is 6mm by 6mm.Determine the pressure that she applies on your foot. (E) If a diver dives to a depth of 35 m what will be: (i) the pressure in Pascals due the water column? (3 marks) (ii) the pressure of the air in…arrow_forwardA gas mixture at 300K and 1 bar analyzing by volume 20% N2 and 80% CH4 is subjected to liquefaction at the rate of 1500 kg/hr. It is found that only 30% (weight) of the entering gas is liquefied and the concentration of N2 in the liquid is 60% by weight. The unliquefied gas leaves the unit at 273K and 1 bar. Determine (a) the volume of the unliquefied gas, m3/hr (b) the composition of the gas leaving expressed as volume %.arrow_forwardP1A.6 The molar mass of a newly synthesized fluorocarbon was measured in a gas microbalance. is device consists of a glass bulb forming one end of a beam, the whole surrounded by a closed container. The beam is pivoted, and the balance point is attained by raising the pressure of gas in the container, so increasing the buoyancy of the enclosed bulb. In one experiment, the balance point was reached when the fluorocarbon pressure was 327.10Torr; for the same setting of the pivot, a balance was reached when CHF3 (M = 70.014 g mol−1) was introduced at 423.22 Torr. A repeat of the experiment with a di erent setting of the pivot required a pressure of 293.22 Torr of the uorocarbon and 427.22 Torr of the CHF3. What is the molar mass of the fluorocarbon? Suggest a molecular formula.arrow_forward
- 20. A mixture consisting of 6 kg of O, and 9 kg of N, has a pressure of 3 bar and temperature of 20°C. For the mixture determine the following : (i) The mole fraction of each component ; (iii) The specific gas constant; (v) The partial pressures and partial volumes. (ii) The average molecular weight ; (iv) The volume and density; [Ans. (i) 0.3684, 0.6315 ; (iüi) 29.475 ; (iii) 0.282 kJ/kg K ; (iv) 4.13 m?, 3.629 kg/m² ; (v) 1.1 bar, 1.894 bar ; 1.52 m², 2.61 m²)arrow_forwardP1A.5 Deduce the relation between the pressure and mass density, p, of a perfect gas of molar mass M. Confirm graphically, using the following data on methoxymethane (dimethyl ether) at 25°C, that perfect behaviour is reached at low pressures and find the molar mass of the gas. p/kPa 12.223 25.20 36.97 60.37 85.23 101.3 p/(kgm) 0.225 0.456 0.664 1.062 1.468 1.734arrow_forwardA 1 cm diameter spherical pellet of a strongly basic oxide is held at the center of a closed vessel of 5-liter volume. Initially the vessel is evacuated and then filled with an equimolar mixture of H₂S and N₂ at 25 °C and 1 atm total pressure. As the molecules of H₂S reach the surface of the pellet, they get absorbed instantaneously so that the concentration of H₂S at the surface remains zero at all time. Diffusion of H₂S occurs through a stagnant film of estimated thickness of 4 mm surrounding the pellet. The bulk of the gas may be assumed to have a uniform composition at any time. Calculate the time of absorption of 95% of H₂S in nitrogen is 1.73x10 m²/s at this temperature and 1 atm pressure. Closed vessel, volume = 5 litres Mixture of H₂S (4) and N₂ (B) H₂S diffuses through N₂ H₂S. Absorbent sphere Total pressure, P=0.5+PAD Gas-film of thickness, 8=4 mmarrow_forward
- P1A.6 The molar mass of a newly synthesized fluorocarbon was measured in a gas microbalance. is device consists of a glass bulb forming one end of a beam, the whole surrounded by a closed container. e beam is pivoted, and the balance point is attained by raising the pressure of gas in the container, so increasing the buoyancy of the enclosed bulb. In one experiment, the balance point was reached when the fluorocarbon pressure was 327.10Torr; for the same setting of the pivot, a balance was reached when CHF3 (M = 70.014 g mol−1) was introduced at 423.22 Torr. A repeat of the experiment with a di erent setting of the pivot required a pressure of 293.22 Torr of the uorocarbon and 427.22 Torr of the CHF3. What is the molar mass of the fluorocarbon? Suggest a molecular formula.arrow_forwardA piece of metal "X" weighing 0.0382 g was placed in an eudiometer containing dilute aqueous HCI. After the metal fully dissolved ,15.4 mL of hydrogen gas was collected by displacement of water and a 400 mm column of water was observed. The water temperature was 25 degrees Celcius and the barometric pressure was 758.8 mm Hg ( torr). Refer to the introduction and data sheet to solve the following problems. a) Calculate the volume occupied by the hydrogen gas at STP. b) How many moles of the metal were consumed in the reaction? c) What is the molar mass of the metal?arrow_forwardA volume meter operates at 28 °C and an internal vacuum of 24 mm Hg. Barometric pressure is 756 mm Hg. The meter measures 13 ft³ of air. What is the volume at standard ambient conditions?arrow_forward
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