switch on the power supply. 3. Set the temperature ’setpoint’ to 1800C. 4. Wait for the steam output through the level valve to ensure that there is no air trapped in the boiler. 5. Close the level valve and continue heating until the maximum gauge pressure reaches 8 bars. 6. Warning: Don’t remove filler plug or open level valve when the device is pressurized. 7. Decrease the temperature ’setpoint’ to room temperature in which the electrical heater will be off. 2. Open the level valve open and switch
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Chemistry 1061: Principles of Chemistry I Gas Laws Gas Laws: Pressure‚ Volume‚ and Temperature Introduction Pressure‚ volume‚ and temperature are properties of gases that reveal their relationships when any one of them is varied. Changing the temperature of a gas may change its volume or pressure‚ but how? What are the mathematical relationships between these properties? Are there limits to them? Scientists have discovered through the study of properties of gases that there is indeed a theoretical
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g) initially at 4.00 atm was compressed from 8.00 L to 2.00 L at constant temperature. After the compression‚ the gas pressure was __________ atm. A) 4.00 B) 2.00 C) 1.00 D) 8.00 E) 16.0 2) A balloon originally had a volume of 4.39 L at 44 °C and a pressure of 729 torr. The balloon must be cooled to __________°C to reduce its volume to 3.78 L (at constant pressure). A) 38 B) 0 C) 72.9 D) 273 E) 546 3) If 50.75 g of a gas occupies 10.0 L at STP‚ 129.3 g of the gas will
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Solve the ff. 1. A sample of He occupies 520 mL at 950 Torr and 25°C. If the sample is transferred to a 1.1-L flask at 25°C‚ what will be the gas pressure in the flask? 2. A balloon has temperature of 28°C. What will be the final temperature of the gas if the volume is reduced to half of the original under isobaric condition? 3. Calculate the volume occupied by 4.23 kg of methane gas at STP. 4. Dry ice is useful in maintaining frozen foods because it vaporizes to CO2 (g) rather than melting
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gas sample was held constant‚ its volume varied inversely with its pressure. The Kelvin scale is known as the absolute scale. Charles’ law states that volume of a given mass varies directly with its absolute temperature if the pressure remains constant. Ideal gases are those whose behavior is exactly described by Boyle’s and Charles’ laws. Avagadro’s principle says that the volume of a gas sample at a given temperature and pressure is proportional to the mass or number of moles of the gas. 2
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techniques can damage the skin. Identify a range of interventions that can reduce the risk of skin breakdown and pressure sores. Describe the changes to an individual skin conditions that should be reported. It is important to avoid or prevent the vulnerable areas or where sores has already formed. Regularly changing position or moving helps to prevent pressure sores developing in a vulnerable areas or to relieve already existing ones. In every clients risk assessment notes it
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s f s f s f sdgfsdf sdf s d g sdf d d f f d sdddddddddd f gf d f ff f f s d gs df sdfgwsgsd gfsdfljkljgs sjgfskjflskjgsl sjflskjsjg skgsjjljdf s jskjljlsjlkjs sjfkjsdflgsenters the boiler at a pressure of 18 MPa‚ and saturated vapor enters the turbine. The condenser pressure is 6 kPa. Determine (a) the thermal efficiency. (b) the back work ratio. (c) the net work of the cycle per unit mass of water flowing‚ in kJ/kg. (d) the heat transfer from the working fluid passing through
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Falls from Society At one point in life‚ everyone must face the realities of societal pressure‚ sometimes leading to atrocious experiences. The reality of societal pressures is the borderline of innocence‚ of which a child has. Teddy‚ being the child‚ has been forced to cross that borderline prematurely by his guardians. In Nowlan’s‚ The Fall of the City‚ symbolism and characters assist in proving that societal pressure exists and remains to be the reason for one’s downfall‚ much like Teddy. Firstly
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reheat-regenerative Rankine cycle. At the inlet of the high pressure turbine‚ the steam pressure and temperature are 10 MPa and 550oC respectively. The steam leaves the high pressure turbine at 0.8 MPa. Some of the steam leaving the high pressure turbine is extracted and supplied to an open feedwater heater‚ while the rest is reheated to 500oC. The reheated steam is expanded in the low-pressure turbine. The steam leaves the low-pressure turbine at 10 kPa. Sketch the cycle on a T-s diagram and determine
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produced in various reactions. The Ideal Gas Law was needed in order to calculate the mass of reactants and moles of gas produced: ‚ where is the pressure in atm‚ is the volume in Liters‚ is the number of moles‚ is the ideal gas constant [0.082 (Latm)/(Kmol)]‚ and is the temperature in Kelvins. Considering the units on R‚ it was important to convert pressure‚ volume‚ and temperature to atm‚ L‚ and K‚ respectively. In this investigation‚ the volume of reaction space needed to be measured. One way to
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