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A piston-cylinder device contains steam initially at 1 MPa, 450°C, and 2.5 m³. Steam is allowed to cool at constant pressure until it first starts condensing. Show the process on a T-v diagram with respect to saturation lines and determine (a) the mass of the steam, (b) the final temperature, and (c) the amount of heat transfer.

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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.

An insulated piston-cylinder device contains 5 L of saturated liquid water at a constant pressure of 175 kPa. Water is stirred by a paddle wheel while a current of 8A flows for 45 min through a resistor placed in the water. If one-half of the liquid is evaporated during this constant-pressure process and the paddle-wheel work amounts to 400 kJ, determine the voltage of the source. Also, show the process on a P-V diagram with respect to saturation lines.

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