Which of the satements below is/are limitations of Dumas Method? i. The Ideal condition is just an assumption for the vapor of the volatile sample ii. The sample must be a volatile liquid with a boiling point above 25°C and below 100°C using similar method ii. Possibility of having Impurities may not cause discrepancies of the result only i and i are the limitations All are Method's limitation O only i is the limitation O only i and ii are the limitations
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- Carbon tetrachloride melts at 250 K. The vapor pressure of the liquid is 10539 Pa at 290 K and 74518 Pa at 340 K. The vapor pressure of the solid is 270 Pa at 232 K and 1092 Pa at 250 K. (a) Calculate AHvaporization and AHsublimation. (b) Calculate AHfusion.Define the relative amounts of liquid and vapor phases in a saturated mixtureare specified by the quality x.(b) TABLE 3 shows data phase equilibrium diagram for carbon dioxide. TABLE 3 Pressure (atm) Temperature (°C) Triple point Critical point 5.2 -57 73 31 (i) Sketch a phase diagram for carbon dioxide (ii) Explain the phase changes that could possibly occur when a sample of carbon dioxide in a closed vessel under 1 atm pressure and a temperature of -78°C is pressurised isothermally to 10atm, followed by isobaric heating to 20°C.
- For items 4-6, consider a one component system with a temperature-pressure phase diagram as shown below. Temperature 4.) Which of the following shows has F = 2 А. А В. В С.Е D. G Е. Н 5.) Which segment shows the gas-solid equilibrium? А. АВ В. АС C. AD D. BD E. AH 6.) Which of the following shows three phases that are at equilibrium? А. А В. В С.D D. D Е. Еliquid to X N. Ask Your X N. Ask Your XA ALEKS-LX GSketching Xx www-awu.aleks.com/alekscgi/x/sl.exe/to_u-IgNsikr7;8P3jH-IvTqeviKFP6W0cqJcWJdIACROQwyw24GWHin7gZDVJOY1PIGdwmoRjhTWafiMXzDVQ21WWbzcCZqUso... lube Maps esc OSTATES OF MATTER Using heat of fusion or vaporization to find the heat needed to... Calculate the amount of heat needed to melt 125. g of solid acetic acid (HCH,CO₂) and bring it to a temperature of 78.1 °C. Round your answer to 3 significant digits. Also, be sure your answer contains a unit symbol. 0 Explanation CRM Q A 2 Check Z W S # 3 X heat of so X X E H $ 4 D 5 > R C % 5 F tv T V MacBook Pro 6 G PA Thank Y & 7 B Ⓒ2022 McGraw Hill LLC. All Rights Reserved. Terms of Use | Privacy Center | Accessibility A YO Aa H U The 8 N J ( 1 9 S K M 0 O TO L < I 05 JE - P 200 40 40 Lar d A7. Assume that the data in the table below stems from a liquid mixture that obeys Raoult's law. mole fraction p(MBenzene)/Torr p(Benzene)/Torr Total x(Methylbenzene pressure/Torr 0 0.30 0.45 0.61 0.84 1 0 7.19 (ii) 14.90 (iv) 25.02 80.00 (i) 43.57 (iii) 11.90 a) Estimate the missing values. b) Estimate the total pressure for each composition. c) Determine which component is more volatile
- Pressure was exerted with a piston on molten naphthalene at 95 °C. The vaporpressure of naphthalene when the applied pressure is 1.0 bar is 2.0 kPa. What is thevapor pressure when the pressure on the liquid is 15 MPa? The mass density ofnaphthalene at this temperature is 1.16 g cm-1.12 (a) (b) Describe how you can obtain the integrated form of the Clapeyron equation as below. State any assumptions you have to make. Afus H (T-T) P₂≈ P₁+ AfusV T₁ The heat of fusion (Afus H) of Hg at its normal melting point (-38.9 °C) is 2.82 cal.g¹. The densities of Hg(s) and Hg(1) at -38.9 °C and 1 atm are 14.193 and 13.690 g cm Estimate the melting point of Hg at 100 atm using the result in (a). respectively. Ans 234.8K or -38.4°CA student obtained a solid product in laboratory synthesis. To verify the identity of the solid, she measured the milting point and found that the material melted over a 12°C range. After it had cooled, she measured the melting point of the same sample again and found that this time the solid HUD a sharp melting point at the temperature that is characteristic of the desired product Why were the two melting points different? What was responsible for the change in the melting point?
- 6. Using phase diagram for the mixtures of benzene and ethylbenzene shown below, estimate: Benzene / Ethybenzene at 1.00 atm By NRTL A) Boiling point of pure ethylbenzene 140- 135- 130- B) Boiling point (Tpp) of solution with molar fraction of benzene 0.3. 125 120- 115 110- C) Composition of vapor phase (molar fractions of both liquids) above the solution with molar fraction of benzene 0.3 at Töp. 105- 100 90 85 80- 75- a1 02 03 04 05 06 0.7 0.8 09 Benzene Mole FracfionikPa is the dissociation vapor 608 pressure of AB salt at 427°C and at 459°C it has increased to 1115 kPa. Find (a) Kp, (b) AG° at the two temperatures as well as AHO. Assume the ideal behaves of gases and the AH is independent on above temperature, also every latm. = 101.323 kPa. AB(s) == A(g) + B(g) a) Kp =9.00 , 30.27 , AG° = -12.97 KJ/mol, -20.75 KJ/mol, AH° = + %3D 50.44 KJ/mol b) Kp =50.00 , 30.27 , AG° = -22.97 %3D KJ/mol, -20.75 KJ/mol, AH° = + %3DQ awu.aleks.com/alekscgi/x/isl.exe/1o_u-IgNsikr7j8P3jH-IvTqeviKFP6W0cqJcWJdIACROQwyw24GWHIntrzjVfiaJ_cKvcyqWTUEIAKXtcoqhtE9... Gibbs Free E... Reading Schedule 19.6 Reduction Po... Y SOLUTION: The le... Math 115 W-S Fall.. 18.3 Gibbs Free E... 5.3 Enthalpies of... 5.3 Enthalpies of... 18.5 Gibbs Free E... 18.5 20,449 2 E W S ENTROPY AND FREE ENERGY Calculating dG from dH and dS A chemical engineer is studying the two reactions shown in the table below. In each case, he fills a reaction vessel with some mixture of the reactants and products at a constant temperature of 98.0 °C and constant total pressure. Then, he measures the reaction enthalpy AH and reaction entropy AS of the first reaction, and the reaction enthalpy AH and reaction free erfergy AG of the second reaction. The results of his measurements are shown in the table. Complete the table. That is, calculate AG for the first reaction and AS for the second. (Round your answer to zero decimal places.) Then, decide whether, under…