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Temperature and pressure may be defined as
Using these definitions, prove that for a simple compressible substance
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Thermodynamics: An Engineering Approach
- PROCESSES OF PURE SUBSTANCE: A 2-kg steam water mixture at 1.0 MPaa is contained in an inflexible tank. Heat is added until the pressure rises to 3.5 MPaa and the temperature to 400 0C. Determine: a) Heat transferred (kJ), b) ΔH (kJ), c)ΔS (kJ/k) (SHOW COMPLETE SOLUTION) (SHOW THE P-V AND T-S DIAGRAM PLEASE)arrow_forwardA piston-cylinder device containing 2kg of saturated H20 at 187 °C has initial specific volume of 0.13 kg/m³. The H20 is then expanded to a pressure of 300 kPa and a temperature of 187 °C. Fill in the following chart of properties for each state, and plot the two states on the given graph. Show all your work on this sheet or the next. State 1 Property P (kPa) State 2 300 T (°C) v (m³/kg) u (kJ/kg) x (phase or quality) 187 187 0.13 Varrow_forward-Thermodynamics- determine the properties of the saturated liquid at 10 bar. Locate the state on a T-S diagram.arrow_forward
- 2. 1-kg of CO2 is compressed from 1MPag and 2000C to 3MPag in a piston-cylinder device arranged to execute a polytropic process for which PV1.2 = constant. Determine the final temperature of the gas (°C). Draw a figure or graph that will support the problem. Explain each step by step formula.arrow_forwardA 0.5 m3 tank contains methane CH4 at 20.68 bar and 38 degrees celsius. Using Avogadro's principle, find the mass of carbon dioxide CO2 (in kg) subjected to the same pressure and temperature in a 3.8-m3 tankarrow_forwardIn general, when a system undergoes a change from state 1 to state 2, the change in enthalpy is given by: deltaH = deltaU + PdeltaV + VdeltaP + deltaPdeltaV Derive this equation from the First Law of Thermodynamics, indicating the conditions assumed for the derivation.arrow_forward
- 1) Given a vessel with V = 0.4 m3 filled with m = 2 of H2O at P = 600 kPa, find • the volume and mass of liquid, and • the volume and mass of vapor.arrow_forwardOxygen undergoes an adiabatic process, the pressure volume relationship given as p = (5/V)+1.5 where is in bar and V is in m3. During the process the volume changes from 1.5 x 108 mm3 to 0.05 m3 and the system takes 45 kJ of heat. Determine (i) Work done (ii) Change in internal energy (iii) Final pressure of the gas, if the initial pressure is 1 atm (iv) Final temperature of gas, if the initial temperature is 80°Carrow_forwardA gas undergoes isobaric expansion at 0.05 bar from 0.1 m³ to 1.0 m³ when 2.0 KiloJoules of heat is applied to it. Which of the following is true regarding the work, heat and the change in internal energy involed in this change (all quantities in KiloJoules)? A. +4.5, -2.0, +2.5 B. -4.5, +2.0, -2.5 C. +4.5, +2.0, +6.5 D. -4.5, -2.0, -6.5arrow_forward
- When U=f(T,v) for an ideal gas if B=1.4 E-5 /K, and if partial derivative of internal energy with respect to volume at constant temperature 6.16 J/m3 with V=5 m3 then the pressure * :is 1.161 E 5 Pa O 6.73 E 6 Pa 7.221 E 4 Pa 3.14 E 5 Pa Oarrow_forwardLiquid-vapor mixture of ammonia, initially at x = 60% and a pressure of 1 MPa, is contained in a piston-cylinder. The mass of the ammonia is 2 kg. As the ammonia is heated, the volume remains constant until the ammonia becomes saturated vapor. Heat transfer to the ammonia continues at polytropic process with n=1 until the pressure is 1 MPa. For the overall process of the ammonia find 1. The work 2. The heat transfer 3. Plot P-v and T-v diagram m= 2 kgarrow_forward6. A closed rigid container with a volume of 0.5 m^3 has hydrogen at an initial pressure of 100 kPa and temperature of 20 c. While the system is heated to 200 c, the hydrogen behaves as an ideal gas. By using the specific heat at constant volume of 10.1919 kJ/(kg*K), but without making any additional assumptions, determine the total heat transferred. Present your answer in kJ using 5 significant figures. I know it is not 2.44x10^3kj can you please explain this problem? Thanks!arrow_forward
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