CHE330 Study Guide - Quiz Guide: Ideal Gas, Liquid Hydrogen, Hydrogen Cyanide

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ceruleancoyote996

20 Mar 2015

School

University of Waterloo

Department

Chemical Engineering

Course

CHE330

Professor

Yi Feng

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5: using the data in the steam tables, determine the numerical values for the following: (a) gl and gv for saturated liquid and vapor at 900 kpa. Should these be the same? (b) hlv/t and slv for saturation at 900 kpa. @900 kpa = sig (1/18)(8. 314) ln(900/1) and hig. @1 kpa nr ln (900/1) = s@1 kpa (from steam table) . @1 kpa = h@1 kpa (from steam table) How well does these result agree with the steam table value: steam undergoes a change from an initial state of 475 c and 3,400 kpa to a final state of. Determine h and s (a) from steam table data. (b) by equations for an ideal gas: (optional) making the use of the fact that eqn. (6. 20) is an exact differential expression,

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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.

Excel exercise.

The common iron mineral magnetite, Fe₃O₄ has a similar spinel structure as Co₃O₄ from our previous homework. This exercise is for the data for magnetite, but you should retrieve your Excel sheet for HW #2, the heat capacity of Co₃O₄. then simply change data and text as needed to Fe₃O₄.

For Fe₃O₄ the HSC data base gives the values of the C_p coefficients A, B, C, D as follows:

A = 415.2

B = â873.7

C = â120.5

D = 800.73

Change your A, B, C, D values as you already are using the cells in your equations to these values for Fe₃O₄. Your C_p,m column will simply now show the Fe₃O₄ data. Change your temperature range to 300-800K in steps of 50K (simply delete the rows above 800, also adjust your graph axes!)

Next, in your table with T values (300-800K) and C_p,m values, insert on top a line for T=298. Then add two columns, one for âH_f and one for S_m. Look up the values for âH_f^o and S_m^o for Fe₃O₄ in the HSC data base installed on two computers (# 04 and 05) in the chemistry library (B201) and place these values in the cells for T=298K.

Enter the equations for âH_f(T) = âH_f^o + â«C_p,mdT and S(T) = S^o + â«(C_p,m/T) dT in the cells at 300K, then copy down to get the values of these functions up to 800K.

Below on this page first derive the equations for H(T) and S(T) to be coded in on your Excel sheet, using the same values for A, B, C and D given above. We can write C_p,m = a + bT + cT^â2 + dT²

with a = A, b = Bx10^â3, c = Cx10⁺⁵ and d = Dx10^â6.

Remember that H(T) = H^o(298) + âHand S(T) = S^o(298) + âS

Your table now will have 4 columns: T (298, 300, 350, â¦. ,800), C_p,m, âH_f and S. On the same one page, add the graphs of C_p,m vs T,âH_f vs T and S vs T . You will probably need to resize and reposition your previous Excel sheet before printing the new sheet on one page containing the new table and three graphs. =======> H= -1146.20 , S= 153.2

Can someone explain the concepts of 3-12?

3- the boiling point if its nonpolar then the highest in mass, the stronger they are (if the are nonpolar). If they are polar then the smaller the radius and the larger charger the higher the boiling point. (if there is any information to add, please do so).

4- The Clasius Clapeyron equation is used, correct? If so, the equation would be ln(p2/1atm) = -38.56/8.314 x (1/348 - 1/351). For some reason though I am getting .99 at rather than .89

5- For enthlapy of Fusion is q = Enthlapy x moles. Because it is released, then it is exothermic which is negative. So 11.8/10 and being exothermic -1.18

6 and 7 I understand that. No need to explain

8- What equation is to calculate the lattice?

9 - Can you explain how the answer was picked? The options are not there but out of those options, it was (a) AI

10- For the band gap, the lower it goes down the periodic table, the lower the band gap (correct?)

11 - For this problem I have no idea which equation to use and I do not understand the problem.

12 - Same with this question as well.

CHE330 Study Guide - Quiz Guide: Ideal Gas, Liquid Hydrogen, Hydrogen Cyanide

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