10:23 ← Quiz 1 19 of 20 -/5 LTE 46 Ō 51:46 Current Attempt in Progress A cylinder fitted with a piston contains 7.69 L of a gas at a pressure of 5.72 atm. The entire apparatus is contained in a water bath to maintain a constant temperature of 25 °C. The piston is released and the gas expands until the pressure inside the cylinder equals the atmospheric pressure outside, which is 1.00 atm. Assume ideal gas behavior and calculate the amount of work done by the gas as it expands at constant temperature. Latm eTextbook and Media Save for Later Attempts: 0 of 2 used Submit Answer Using multiple attempts will impact your score. 50% score reduction after attempt 1 AA education.wiley.com с

10:23 ← Quiz 1 19 of 20 -/5 LTE 46 Ō 51:46 Current Attempt in Progress A cylinder fitted with a piston contains 7.69 L of a gas at a pressure of 5.72 atm. The entire apparatus is contained in a water bath to maintain a constant temperature of 25 °C. The piston is released and the gas expands until the pressure inside the cylinder equals the atmospheric pressure outside, which is 1.00 atm. Assume ideal gas behavior and calculate the amount of work done by the gas as it expands at constant temperature. Latm eTextbook and Media Save for Later Attempts: 0 of 2 used Submit Answer Using multiple attempts will impact your score. 50% score reduction after attempt 1 AA education.wiley.com с

Refrigeration and Air Conditioning Technology (MindTap Course List)

8th Edition

ISBN:9781305578296

Author:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson

Publisher:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson

Chapter11: Calibrating Instruments

Section: Chapter Questions

Problem 7RQ: Accuracy of a thermometer is more important in the ______temperature ranges.

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Task 4A metal tank contains air at 20 C and 400 kPa. The tank volume is 5 m3. It is connected through avalve to another tank containing 7 kg of air at 40 C and 300 kPa. After 10 minutes, the valve isopened, and the whole system will reach thermal equilibrium with the surroundings (T= 25 C).Determine the volume of the second tank and the final pressure of air. Explain the relationships between system constants for a perfect gas.
Evaporative cooling PLEASE DO NOT USE PSYCHROMETRIC CHART. THANK YOU In the diagram below inlet air is drawn over a pool of liquid water in a steady-state, steady-flow isobaric process. Evaporation on the pool resultsin saturated air at the exit. The pool of liquid water is assumed to be at the same temperature as the exitair. Discharge fans at the exit provide a volumetric flow rate of 800,000 ft3/min. In the diagram above inlet air is drawn over a pool of liquid water in a steady-state, steady-flow isobaric process. Evaporation on the pool resultsin saturated air at the exit. The pool of liquid water is assumed to be at the same temperature as the exitair. Discharge fans at the exit provide a volumetric flow rate of 800,000 ft^3/min. Problem #1: Assume that the exit temperature is T2 = 90 °F. For this model of the system and from thedata provided determine:a) The mass flow rate dry air through the system (lbm/sec).b) The rate of heat that is output from the R-134a condenser Qout…
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Solve all 3 correctly as per bartleby rule. I
8. The exact differential equation of enthalpy can be expressed as below: dH=-uCpdp + C₂dT where C: constant pressure heat capacity u: Joule-Thomson coefficient μl= a) Derive the exact differential equation of enthalpy from the general exact differential equation of enthalpy: = (3), dp + (7) dr T dH = b) Considering that you use nitrogen gas to make a temperature drop to an isenthalpic system, how much pressure drop is required to cool the system by 20 K? The Joule-Thomson coefficient of nitrogen is u 3 0.27 K atm¹. c) Prove that the Joule-Thomson expansion can occur without change of enthalpy (isenthalpic process).
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1. Consider the following schematic of a power plant (operating in what is called a 'Rankine Cycle') Turbine Steam generator Condenser Coling water Economiaer The power plant control room reports that the plant is operating continuously at the following peak load conditions: a. Power to pump = 300KW b. Rate of steam flow = 25 kg/s c. Cooling water temperature at condenser inlet = 13 C d. Cooling water temperature at condenser outlet = 34 C Additionally, the following measurements were made at various points in the piping connecting the power plant components Data Pressure Temp. Quality enthalpy Specific Velocity (kJ/kg) point (kPa) volume (m/s) (m3/kg) (C) (x) 1 6200 2 6100 43 5900 177 ---- 4. 5700 493 ----- 5 5500 482 ----- 6 103 0.94 183 7 96 43 -----
The pressure ratio during the constant volume portion of combustion in a Dual Combustion engine is 1.89 . If the pressure at the end of the constant volume addition of heat is 4.49 , what is the pressure at the beginning?
5.19 : The temperature in a surface condenser is 37.651°C and a vacuum is 700 mm of Hg. Barometer reads 755.2 mm of Hq. Correct the vacuum to a standard barometer of 760 mm of Hg and hence determine (1) The partial pressure of steam and air. (2) Weight of air associated with 1 kg of steam.
2. The actual specific evaporation of a certain boiler is 10. Factor of evaporation is 1.05. If the heating value of fuel is 30,000 kJ/kg, find the boiler efficiency. 3. Two boilers are operating steadily on 91000 kg of coal contained in a bunker. One boiler is producing 1591 kg of steam per hour at 1.2 factor of evaporation and an efficiency of 65% and another boiler produces 1364 kg of steam per hour at 1.15 factor for evaporation and efficiency of 60%. How many hours will coal in the bunker run the boilers if the heating value of coal is 7590 kcal/kg?
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