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CHE 3172 Chapter : ThermoHW01 Fall2011

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azuremammoth471

15 Mar 2019

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A rigid tank of 100 l contains equal volumes of liquid and vapor of refrigerant r12 at 35 c. We add r12 to the tank until the final mass of r12 inside the tank is 80 kg. A cylinder/piston arrangement contains 5 kg of water at 100 c with x = Initially the piston of mass mp = 75 kg rests on a set of stops (see figure). The outside pressure is 100 kpa, and the area of the piston is. Heat is now added until the water reaches a saturated vapor state. Find the initial volume, final pressure, total work done by the water and total heat transferred to the water. A cylinder having a piston restrained by a linear spring contains 0. 5 kg of saturated water vapor at 120 c, as shown in the figure.

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Related Questions

A 4L rigid tank contains 2 kg of saturated liquid vapor mixture of water at 50 C.The water is now slowly heated until it exists in a single phase.At the final state,will the water be in the liquid phase or the vapor phase?What would your answer be if the volume of the tank were 400 L instead of 4 L?

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ivorycheetah911

tables are in the link below:

https://cms.psu.edu/Spring2/201314SP/201314SPUP___RM_E__300_002/_assoc/5FAED765001F4138B07B0F0D0421F67A/Tables_D.pdf

A piston-cylinder device contains 0.8 kg of steam at 400K and 150 kPa. Steam is compressed at constant temperature until one-half of the mass condenses. Use the Problem Solving Method. Sketch the process on a T - nu diagram. Include the vapor dome and the constant pressure curves that pass through the initial and final states. Find the final pressure. Determine the initial and final volume. Determine the quality at the final state. A piston-cylinder device initially contains 50 L of liquid water at 300 K and 300 kPa. Heat is added to the water at constant pressure until the entire liquid is vaporized. (For a compressed liquid, use Vf and uf at the same temperature.) Use the Problem Solving Method. Show the process on a T - nu diagram with the vapor dome. Draw the constant pressure curve for 300 kPa from the compressed liquid region to the superheated vapor region. What is the mass of the water? What is the final temperature? What is the final volume? Determine the total change in internal energy Problem Solving Method Use the bold titles below as headings in your solutions. KNOWN: In your own words, briefly state the geometry and the given quantities of the problem. FIND: What is unknown that we are asked to find. SKETCH: Include a sketch for each problem. Also include a P-v, or T-s curve as appropriate. ASSUMPTIONS: These need to be justified if they are atypical. PROPERTIES: List the properties that were used and reference the table in which the values were found. For example: Superheated water, Table D.3I h(480K, 1.0MPa) = 2844.7 kJ/kg ANALYSIS: Solve the problem, step-by-step, and always include units. Give the final answer to four significant digits and box the final answer. DISCUSSION: Discuss your results. Are the results expected? Miscalculations can lead to unrealistic results. Indicate if you feel that your answer is not realistic. How do the results compare to other conditions such as standard atmospheric conditions, internal combustion engine or power plant.

Show transcribed image text A piston-cylinder device contains 0.8 kg of steam at 400K and 150 kPa. Steam is compressed at constant temperature until one-half of the mass condenses. Use the Problem Solving Method. Sketch the process on a T - nu diagram. Include the vapor dome and the constant pressure curves that pass through the initial and final states. Find the final pressure. Determine the initial and final volume. Determine the quality at the final state. A piston-cylinder device initially contains 50 L of liquid water at 300 K and 300 kPa. Heat is added to the water at constant pressure until the entire liquid is vaporized. (For a compressed liquid, use Vf and uf at the same temperature.) Use the Problem Solving Method. Show the process on a T - nu diagram with the vapor dome. Draw the constant pressure curve for 300 kPa from the compressed liquid region to the superheated vapor region. What is the mass of the water? What is the final temperature? What is the final volume? Determine the total change in internal energy Problem Solving Method Use the bold titles below as headings in your solutions. KNOWN: In your own words, briefly state the geometry and the given quantities of the problem. FIND: What is unknown that we are asked to find. SKETCH: Include a sketch for each problem. Also include a P-v, or T-s curve as appropriate. ASSUMPTIONS: These need to be justified if they are atypical. PROPERTIES: List the properties that were used and reference the table in which the values were found. For example: Superheated water, Table D.3I h(480K, 1.0MPa) = 2844.7 kJ/kg ANALYSIS: Solve the problem, step-by-step, and always include units. Give the final answer to four significant digits and box the final answer. DISCUSSION: Discuss your results. Are the results expected? Miscalculations can lead to unrealistic results. Indicate if you feel that your answer is not realistic. How do the results compare to other conditions such as standard atmospheric conditions, internal combustion engine or power plant.