Use the phase diagram for carbon (shown at right) to describe the phase changes that a sample of carbon undergoes during the following: (a) The sample is heated at 10 bar (99 atm) from 1000 K to 5000 K. (b) The sample is then compressed at 5000 K to 10 bar (990.000 atm).

Use the phase diagram for carbon (shown at right) to describe the phase changes that a sample of carbon undergoes during the following: (a) The sample is heated at 10 bar (99 atm) from 1000 K to 5000 K. (b) The sample is then compressed at 5000 K to 10 bar (990.000 atm).

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

See similar textbooks

Similar questions

Consider the phase diagram for water in pressure-volume coordinates and answer the following: A) Saturation pressure of water at 170 °C is 7.9 bar. What would be the state of water at this temperature, but at 10 bar? Justify your answer, making a sketch of the P-V diagram showing these conditions. B) At 60 bar, the specific volume of saturated vapor and saturated liquid for water are 0.03344 m³/kg and 0.001 m³/kg, respectively. What would be the state of water at 60 bar if its specific volume were 0.05 m3/kg? Justify your answer, making a sketch of the P-V diagram, showing these conditions.
Shown to the right is the solid-liquid phase behavior for mixtures of component A and component B at 1 atm. Use the phase diagram to answer the following questions. a) Specify the melting point of substance B at 1 atm b) What is the maximum composition (mole fraction) of component B that is possible for the mixture to exist in phase S2? At what temperature does this occur? c) 20mol of component A and 180mol of component B are mixed at 350°C and 1 atm. The mixture is cooled at constant pressure to 200°C. i) What phases are present at the final state? ii) What is the composition of each phase at the final state? iii) What is the number of moles of each phase at the final state?
The following drawing shows the phase diagram at constant pressure for two liquids (A and B). When 30 g of pure A and 70 g of pure B are mixed: a) Reason what the diagram looks like and identify each part. b) At what temperature will the mixture start to boil? What will be the composition of the steam at that time? c) What is the amount of distillate at 130C°? 160 P= Tatm 150 140 O 130 120 T10 100 O 10 20 30 40 50 60 70 80 90 100 % B In weight
Consider Al- Cu system below. When Al-40%Cu is heated above 600°C and cooled slowly to a temperature of 545°C . Answer the following. Use the values of composition given in the phase diagram , no estimation .Each has two marks. 700 1200 600 L a + L 6 +L 548 1000 500 (CUAL) a + 6 800 400 600 300 5.65 10 20 30 32.7 40 50 52.5 (AI) Composition (wt % Cu) a. Percentage of the pro-eutectic phase present (% no decimal places) b. Composition of the pro- eutectic phase present (in %Cu one decimal place) c. What is the percentage of larger eutectic component present (% no decimal places) Temperature (°C) Temperature (°F)
In the region indicated with arrows in the phase diagram shown below (above the upper line), which of the following statements are true: 1300 - L (liquid) O b. O C. T(°C) 1200 20 30 ↑ wt% Ni 40 There are solid grains mixed with a liquid phase There is no solid fraction in the material liquidus solidus α (solid) Select one or more: a. The proportion of alpha phase increases going from right to left at a fixed temperature. 50 Od. The proportion of "L" phase increases going from right to left at a fixed temperature O e. The composition of the phase is pure liquid
Using appropriate tables provided in the lecture material, determine the missing properties and the phase descriptions in the following tables for water. T, C P, kPa T, m3/kg | Phase description 50 7.72 400 Saturated vapor 250 500 110 350
Problem 3 Given here are the solidus and liquidus tem- peratures for the copper-gold system. Con- struct the phase diagram for this system and label each region. Composition (wt% Au) 0 20 40 60 80 90 95 100 Solidus Liquidus Temperature (°C) Temperature (°C) 1085 1019 972 934 911 928 974 1064 1085 1042 996 946 911 942 984 1064
For the metals A and B, which are given below, create the hypothetical phase diagram between 500 ° C and 900 ° C temperatures.Ø A metal has a melting temperature of 840 ° C.The solubility of Ø B in A can be ignored at all temperatures.Ø Melting temperature of Metal B is 730 ° C.The maximum solubility of A in Ø B is 10% A by weight, which occurs at 600 ° C.At 500 ° C, the solubility of A in B is 6% A by weight.Ø An eutectic 600 ° C and 74% B by weight - 26% by weight A are formed.Ø The second eutectic occurs at 630 ° C and 59% B - 41% A by weight.Ø A third eutectic occurs at 655 ° C and 39% B - 61% A by weight.Ø A congress melting point is formed at 680 ° C and 52% B - 48% A by weight.Ø A second congress melting point is formed at 655 ° C and 66% B - 34% A by weight.Ø Intermetallic compound AB is present at 52 wt% B - 48 wt% A.Ø Intermetallic compound AB2 is present at 66 wt% B to 34 wt% A.
2. a) How many kilograms of nickel must be added to 1.75 kg of copper to yield a liquidus temperature of 1300 °C? b) How many kilograms of nickel must be added to 5.43 kg of copper to yield a solidus temperature of 1200 °C? c) The solidus and liquidus temperatures for the copper-gold system are given here. Construct the phase diagram for this system and label each region. Composition (wt.% Au) Solidus Temperature (C) Liquidus Temperature (C) 1085 1085 1019 972 20 1042 996 946 40 60 934 80 911 911 90 928 942 95 974 984 100 1064 1064
You are working with a derivative of naphthalene and, like its parent compound, it has a high triple point and sublimates fairly readily at temperatures near room temperature. At temperatures below 400 K, you find that the vapor pressure of its solid can be represented by the function P 4200 K (1)-11.5 = 11.5 1 atm T Use this equation to estimate the normal sublimation temperature of this compound, Tsubl (in K).
1. Visualize a substance with the following points on the phase diagram: a triplepoint at 0.05 atm and 150 K; a normal melting point at 175 K; a normal boiling pointat 350 K; and a critical point at 2.0 atm and 450 K. The solid liquid line is “normal”(meaning positive sloping). For this, complete the following:a. Roughly sketch the phase diagram, using units of atmosphere and Kelvin. Labelthe area 1, 2, and 3, and points T and C on the diagram.b. Describe what one would see at pressures and temperatures above 2.0 atmand 450 K.c. Describe the phase changes from 50 K to 250 K at 1.5 atm.d. What exists in a system that is at 1 atm and 350 K?e. What exists in a system that is at 1 atm and 175 K?2. Based from the phase diagrams of water and carbon dioxide, answer thefollowing questions and justify your answers: 1. You have ice at 263 K (-10.0 oC)and 1.0 atm. What could you do to make the ice sublime? 2. A sample of dry ice(solid CO2) is cooled to 173 K (-100.0 oC), and is set on a table at…
Consider 1 kg of tin-bismuth alloy (Sn-Bi) containing 40 wt% Bi. The phase diagram of the alloy is shown in the figure below. The alloy is cooled to 138 "C (just below the eutectic temperature). How many kilograms of phase B form? 300 271°C 232°C 200 Bi + L В +L 139 C 21 100 Bi - В + Bi 13°C vate Windows 100gs to activate Windows (Bi) 20 40 60 80 (Sn) 6:37 PM A 4) ENG 57 B. Temperature (°C)