QATAR UNIVERSITY College of Engineering Dept. of Mechanical & Industrial Engineering Industrial Engineering Program 4. Name: ID: ID: كلية الهندسة College of Engineering جـامـعـة قـطـر QATAR UNIVERSITY Title of experiment:

Ideal Gas Equation of State Laboratory: Renewable Energy / Thermodynamics Laboratory Course(s): Thermofluids, Thermodynamics Objectives The objective of the experiment is to verify the Ideal Gas Equation of State. Experimental setup Before starting the exercise ensure that both rigid vessels are at atmospheric pressure by opening ball valves V₁ and V3 on top of the vessels (open to atmosphere). Now close all valves before commencing the exercise. A data logger (data acquisition software/system) or chart recorder can be used to observe the transient nature of the pressure and temperature inside the vessel and to obtain an accurate value for the initial and final temperatures and pressures. The volume of the large vessel is 0.0224 m³ and that of the small vessel is 0.0091 m³ Method V1₁ *V5 VA www Vessel 1 with a larger volume is initially pressurized while the smaller vessel 2 is evacuated and allowed to stabilize at ambient temperature. Once equilibrium is reached the Pressures and Temperature in the two tanks stabilize. Knowing the volume of the two tanks and the pressures inside the tank which is at thermal equilibrium with atmospheric conditions, the mass of air in each of the tanks can be calculated using the ideal gas equation of state. Then air is allowed to leak very slowly from the pressurized vessel into the other vessel via a needle valve. This process is isothermal. The final pressure of the two tanks can be predicted using the ideal gas equation of state. The predicted final conditions are experimentally validated using this experiment. Theory and Calculations The theory for this experiment makes the assumption that air behaves as a perfect gas. The final equilibrium pressure Pabsf can be determined from the ideal gas equation of state: Pabs f mRT V Where m is the sum of the initial mass present in the two vessels, m1 + m2 And V = V₁ + V₂ V₁(0.0224 m³) and V₂(0.0091m³) are volumes of the large and small vessels respectively Experimental procedure Measure and record Patm using a barometer. Start the data logger and start acquiring data. The data acquisition system records the reading Make sure that all valves are closed. Now open the valves V4 and V6 from and to the pump respectively with all other valves still closed. Pressure Barometric pressure Post lab tasks Absolute pressure 1 Gauge pressure 1 Discussion: (aA+) Gauge pressure 2 (-ve) Absolute pressure 2 P₁ Atmospheric reference Operate the pump and create a vacuum inside the small vessel and a pressure inside the large vessel. Please note that 0 a pressure of 30 kN/m² is not exceeded. Stop the air pump and close valves V4 and V6 and wait until the vacuum and pressure readings stabilise (temperature of the air inside the vessels achieves room temperature). How well does the result obtained compare to the predicted result? Give possible reasons for any difference. P₂ The required change is a very gradual change in the vacuum/pressure inside the vessels, in effect a slow leak that does not affect the temperature of the air inside the vessels (isothermal) This is achieved by opening the needle vlave V5 slightly until the pressure/vacuum reading start to change. If the movement of air is audible then the needle valve V5 has been opened too far and must be closed slightly. Similarly if readings of T₁ ande T2 are observed to change then needle valve V5 has been opened too far and must be closed. As the pressure difference between the two vessels reduces, valve V5 can be opened further to reduce the time of the exercise, provided that it is not opened sufficiently to affect T₁ and T2. Absolute reference. Calculate the predicted pressure inside the tanks after the valve between the tanks are opened and the system reaches equilibrium. Conclusion: Conclude your report with what you have learnt from this experiment. Supplement Pre-lab tasks Read lab and safety manuals before conducting experiments. Observations Record your observations under the following headings: Atmospheric pressure (measured) Starting temperature tank 1 Starting pressure tank 1 (measured) (measured) Starting temperature tank 2 (measured) Starting pressure tank 2 (measured) Final temperature Final pressure (measured) (measured) Patm ti P₁ t₂ P2 tf Pf N/m² °C N/m² °C N/m² °C N/m/nSolve this experimental report, according to the photos attached,, moreover there is a blank template to fill. I attached also a past report for this experiment. So it might help to solve. They took the full mark i already attached previous report so just apply the data in the two photos and do the calculations