Homework_7 thermodynamics

During the operation of a thermal machine, a reduction in the entropy of the working substance is quantified. In light of the second law of thermodynamics a) this result is acceptable, because not all the systems that participate in the process are being included. b) there must be an error in the calculation, because the entropy of the process cannot decrease. c) is acceptable, because in a process the entropy of the universe can decrease, but not in a cycle. d) the result is acceptable, because it must be an irreversible process.

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Based on the first law of thermodynamics, which of the following is wrong? A the heat transfer equal the work plus energy change B the net heat transfer equals the net work of the cycle c) the heat transfer cannot exceed the work done D the net heat transfer equals the energy change if no work is done

I need handwritten solution. Please don't use chatgpt. Thermodynamics.

Material A with initial temperature of 80 ⁰C came into contact with material B with initial temperature of 15 ⁰C. What are the scenario/s that would likely to happen? W. Temperature of material B will be above 80 ⁰C X. Entropy of material A will increase Y. Energy transfer is from material B to material A Z. Temperature of material A will be below 15 ⁰C Choose the correct letter below. A.) If all 4 statements are true B.) If 3 of the 4 statements are true C.) If 2 of the 4 statements are true D.) If only 1 of the 4 statements is true E.) If none of the 4 statements is true

Question # 1  a) How engineering thermodynamic differs from statistical thermodynamic b) Explain what you understand by thermodynamic equilibrium?  c) A can of soft drink at room temperature is put into the refrigerator so that it will cool. Would  you model the can of soft drink as a closed system or as an open system? Explain.

QThe equilibrium relationship representing the crud oil and associated gas system is : P= P xi where po vapor pressure of the component i. The composition of a crude oil and the vapor pressures are given below xi Component C3 pº 0.20 190 i-C4 0.10 72.2 n-C4 0.10 51.6 i-C5 0.20 20.44 n-C5 0.20 15.57 CO₂ 0.20 1100 The reservoir pressure and temperature are 500 psia and 100°F, respectively. API Of crude oil is 28. Calculate the surface tension الد السطي

(Thermodynamics)(True or False) A steady-flow system can involve boundary work.

Find the temperature in degree C at state 4 to 2 deciamal places. QUESTION 35 The following processes occurs in a reversible thermodynamic cycle: 1-2: Reversible polytropic compression at pressure X] bar at volume [M] m° to a pressure [Z] bar and specific volume [A] m°/kg. The index of compression may be taken as n. 2-3: Reversibly expansion with expansion index of 2 to pressure [B] bar. 3-1: Reversible cooling at constant volume to the initial state. Calculate the work done for the constant volume process? Click Save and Submit to save and submit. Click Save All Answers to save all answers. Save All Answers Type here to search 由 acer

Please answer it correctly. write your soln. complete and explain if necessary. THANK YOU! answer it in 1hr. TOPIC: SECOND LAW OF THERMODYNAMICS

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The subject is Thermodynamics 1 1. Enumerate and explain the Four Fundamental Laws of Thermodynamics.

26.1 please provide all necessary solutions and explanations.

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In the following process, the variables are constant a. Linear b. Static process O c. Dynamic process d. Controlled process

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consider the follwoing statement: 1. zeroth law of thermodynamics is related to temperature 2. Entropy is related to first law of thermodynamics 3. Internal energy of an ideal gas is a function of temperature and pressure 4. Van der Waals' equation is related to an ideal gas which of the above statements is/are correct?   a. 1 and 3 b. 2 and 3 c. 1 only  d. 2,3 and 4

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within a piston-cylinder assembly undergoes a thermodynamic cycle consisting of A gas three processes: Process 1-2: Constant volume, V = 0.06 m², U2 - U, = 40.4 kJ Process 2-3: Expansion with PV = constant, U3 - U2= 0 Process 3-1: Constant pressure, P =3 bar, W31 = (-20) kJ There are no significant changes in kinetic or potential energy. %3D Identify the process on a sketch of p-V diagram plotted for the cycle. Formulate the expression for heat transfer for process 2-3 and process 3-1. (Hint: Apply first law of thermodynamics for closed systems) (a) (b) (c) Solve to find the net-work for the cycle and heat transfer for the process 2-3 and Heat transfer for process 3-1, in kJ Identify if the above system executes a power cycle or a refrigeration cycle. Give (d) reason.

Given the following situations, tell whether it applies the first law of thermodynamics or second law of thermodynamics. Draw a smiley face if applies the first law and a heart if it applies the second law. 1. Food digestion 2. Rusting of iron 3. Photosynthesis 4. Using aircon during summer 5. Simple motor 6. Growing younger 7. Plugging TV to watch a program 8. Riding a bicycle 9. Generator 10. Heat flows from lower to higher temperature

Two identical cyclists ride up the same mountain, both starting at the same time. Rider 1 rides straight up the mountain, and Rider 2 rides up the longer road that has a lower grade. Rider 1 gets to the top before Rider 2. Ignoring friction and wind resistance, which one of the following statements is true? rider 1 work > rider 2 work rider 1 power > rider 2 power rider 1 work = rider 2 work rider 2 power - rider 2 power rider 1 work = rider 2 work rider 1 power > rider 2 power rider 1 work = rider 2 work rider 1 power < rider 2 power

19. A spacecraft, traveling in deep space, fires thrusters to achieve a change in speed of 2.8 km/s. If the specific impulse of the thrusters is 300 s, what is the ratio of the initial spacecraft mass to the spacecraft mass after the thrusters have fired? a. 0.9 3000/2.8 2.6 C. 8.2 d. None of the above 20. The state vectors for an Earth-orbiting spacecraft at a given point in tim 5

A closed system undergoes a thermodynamic cycle with 2 steps: process 1-2 (from state 1 to state 2), process 2-1 (from state 2 to state 1). During process 1-2, the system received energy by heat transfer of 25J. During process 2-1, energy was transferred from the system to its surrounding by heat transfer of 15J. This is a power cycle. True False

At steady state, a heat pump driven by an electric motor maintains the interior of a building at TH=293 K. The rate of heat transfer, in kJ/h, from the building through its walls and roof is given by 8000(TH-TC), where Tc is the outdoor temperature. Determine the minimum electric power, in kW, required to drive the heat pump for Tc = 276 K. (W cycle) min = i eTextbook and Media Save for Later kW Attempts: 0 of 5 used Submit Answer

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Derive the seven general property equation of the following thermodynamics processes: a. POLYTROPIC PROCESS

An ideal gas contained in a piston-and-cylinder device undergoes a thermodynamic cycle made up of three quasi-equilibrium processes. Step 1-2: Adiabatic compression from 330 K and 9.35 atm to 12.58 atm Step 2-3: Isobaric cooling Step 3-1: Isothermal expansion   a.) Carefully draw this process in a traditional piston-and-cylinder schematic b.) Sketch the process path for this cycle on a PV Diagram. Put a point on the diagram for each state and label it. Be sure to include and label all the important features for a complete PV diagram for this system.

Problems 1-8 are a continuation of HW #6. All answers should have 4 or 5 significant figures. For problems 1-8 please solve for u (specific internal.energy) and h (specific enthalpy), for water (H2O), given the following information. 1. H2O, T = 150°C, P = 50 bar 2. H2O, T = 200°C, P = 10 bar 3. H20, T = 120°C, v = 0.5000 m3/kg 4. H20, P = 5 bar, u = 0.7000 m/kg

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