CHE330 Chapter Notes - Chapter 4: Superheated Steam, Gibbs Free Energy, Isentropic Process

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ceruleancoyote996

20 Mar 2015

School

University of Waterloo

Department

Chemical Engineering

Course

CHE330

Professor

Yi Feng

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6. 1 property relations for homogeneous phases; gibbs energy as a generating function. 6. 3&6. 7 residual properties by eos and generalized correlations. Steam table: a 2-phase system of liquid water and water vapor in equilibrium at 8,000 kpa consists of equal volumes of liquid and vapor. 6. 5&6. 6 thermo diagrams; steam tables: a rigid vessel contains 0. 014 m3 of saturated-vapor steam in equilibrium with 0. 021 m3 of saturated-liquid water at 100 c. Heat is transferred to the vessel until one phase just disappears, and a single phase remains. How much heat needs to be transferred to the vessel per unit mass of water in the vessel? (answer: 1221. 8 j/g) Steam undergoes a change from an initial state of 475 c and 3,400 kpa to a final state of.

Related Questions

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.

CHE330 Chapter Notes - Chapter 4: Superheated Steam, Gibbs Free Energy, Isentropic Process

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