CHEMISTRY-MASTERINGCHEMISTRY W/ETEXT
8th Edition
ISBN: 9780135204634
Author: Robinson
Publisher: PEARSON
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Textbook Question
Chapter 11, Problem 11.55SP
Look at the phase diagram of
(a) The temperature is reduced from 48 °C to -4.4 °C at a constant pressure of 6.5 atm.
(b) The pressure is increased from 85 atm to 226 atm at a constant temperature of 380 °C.
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8.
(a) Use the Clausius-Clapeyron equation and calculate the vapor pressure (mm Hg) of fluoroethane at
-80 °C, given that the vapor pressure is 400. mm Hg at a temperature of -46 °C. The enthalpy of vaporization of
fluoroethane is 23.0 kJ/mol.
(b) Calculate the enthalpy of vaporization for a compound if its vapor pressure is 70 mm Hg at -50 °C
and 323 mm Hg at -28 °C.
A 5.4-L closed vessel is filled with 0.46 g of liquid ethanol. This ethanol containing closed vessel
is placed in the freezer and reaches the vapor pressure of 6.65 torr at -11 C.
(i) Is there any liquid ethanol remained in the closed vessel when the container is removed
and warmed to the temperature of 25 C? Justify your answer.
(ii) How many grams of liquid ethanol remained in the vessel at 2.0 C?
The enthalpy changes of vaporization, AH,vap of ethanol is 40.5 kJ/mol.
The molar mass of ethanol is 46.07 g/mol.
The phase diagram of a hypothetical substance is
(a) Estimate the normal boiling point and freezing point ofthe substance. (b) What is the physical state of the substanceunder the following conditions? (i) T = 150 K, P = 0.2 atm;(ii) T = 100 K, P = 0.8 atm; (iii) T = 300 K, P = 1.0 atm.(c) What is the triple point of the substance?
Chapter 11 Solutions
CHEMISTRY-MASTERINGCHEMISTRY W/ETEXT
Ch. 11 - Prob. 11.1PCh. 11 - The normal boiling point of water is 100.0 C, and...Ch. 11 - PRACTICE 11.1 The boiling point of ethanol is 78.4...Ch. 11 - APPLY 11.2 Chloroform CHCl3 has Hvap=29.2kJ/mol...Ch. 11 - How much heat is required to convert15.0 g of...Ch. 11 - APPLY 11.4 What is the sign and magnitude of q...Ch. 11 - Look at the phase diagram of H2O in Figure 11.7,...Ch. 11 - Prob. 11.8ACh. 11 - Why was a new solvent needed for extracting...Ch. 11 - A fire extinguisher containing carbon dioxide has...
Ch. 11 - Look at the phase diagram of CO2 in Figure11.13,...Ch. 11 - Liquid carbon dioxide is also used as non-toxic...Ch. 11 - For the phase transition CO2(s)CO2(g), predict the...Ch. 11 - A sample of supercritical carbon dioxide was...Ch. 11 - Assume that you have a liquid in a cylinder...Ch. 11 - The phase diagram of a substance is shown below....Ch. 11 - Prob. 11.17CPCh. 11 - Prob. 11.18CPCh. 11 - The following compound undergoes a phase...Ch. 11 - A magnetized needle gently placed on the surface...Ch. 11 - Water flows quickly through the narrow neck of a...Ch. 11 - Predict which substance in each pair has the...Ch. 11 - Prob. 11.23SPCh. 11 - The chemical structure for oleic acid, the primary...Ch. 11 - Prob. 11.25SPCh. 11 - Prob. 11.26SPCh. 11 - The vapor pressure of SiCI4 is 100 mm Hg at 5.4 C,...Ch. 11 - What is the vapor pressure of CS2 in mm Hg at 20.0...Ch. 11 - What is the vapor pressure of SiCI4 in mm Hg at...Ch. 11 - Dichloromethane, CH2CI2, is an organic solvent...Ch. 11 - Prob. 11.31SPCh. 11 - Use the plot you made in Problem 11.30 to find a...Ch. 11 - Prob. 11.33SPCh. 11 - Prob. 11.34SPCh. 11 - Prob. 11.35SPCh. 11 - Prob. 11.36SPCh. 11 - Acetone,acommon laboratorysolvent,has...Ch. 11 - Why is Hvap usually larger than Hfusion ?Ch. 11 - Why is the heat of sublimation, Hsubl, equal to...Ch. 11 - Naphthalene, better known as "mothballs," has bp =...Ch. 11 - Prob. 11.41SPCh. 11 - Prob. 11.42SPCh. 11 - Prob. 11.43SPCh. 11 - Prob. 11.44SPCh. 11 - Prob. 11.45SPCh. 11 - How much energy in kilojoules is needed to heat...Ch. 11 - Prob. 11.47SPCh. 11 - How much energy in kilojoules is released when...Ch. 11 - How much energy in kilojoules is released when...Ch. 11 - Prob. 11.50SPCh. 11 - Prob. 11.51SPCh. 11 - Prob. 11.52SPCh. 11 - Prob. 11.53SPCh. 11 - Prob. 11.54SPCh. 11 - Look at the phase diagram of H2O in Figure 11.7,...Ch. 11 - Prob. 11.56SPCh. 11 - Oxygen has Tt=54.3K,Pt=1.14mmHg,Tc=154.6K, and...Ch. 11 - Prob. 11.58SPCh. 11 - Prob. 11.59SPCh. 11 - Prob. 11.60SPCh. 11 - Prob. 11.61SPCh. 11 - Benzene has a melting point of 5.53 C and a...Ch. 11 - Prob. 11.63SPCh. 11 - How many phase transitions did you pass through in...Ch. 11 - Prob. 11.65SPCh. 11 - Prob. 11.66SPCh. 11 - Prob. 11.67SPCh. 11 - Prob. 11.68SPCh. 11 - Prob. 11.69SPCh. 11 - Prob. 11.70SPCh. 11 - Prob. 11.71SPCh. 11 - Prob. 11.72SPCh. 11 - Prob. 11.73SPCh. 11 - For each of the following substances, identify the...Ch. 11 - The chlorofluorocarbon refrigerant...Ch. 11 - Prob. 11.76MPCh. 11 - Prob. 11.77MP
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, chemistry and related others by exploring similar questions and additional content below.Similar questions
- 6-84 (Chemical Connections 6D) What is the chemical formula for the main component of limestone and marble?arrow_forward5-106 The normal boiling point of hexane, C6H14, is 69°C, and that of pentane, C5H12, is 36°C. Predict which of these compounds has a higher vapor pressure at 20°C.arrow_forwardUse Figure 11.7 to estimate the boiling point of carbon tetrachloride, CCl4, under an external pressure of 250 mmHg.arrow_forward
- Chloroform, CHCl3, has a normal boiling point of 61C. Its vapor pressure at 43C is 0.526 atm. What is the concentration (in g/L) of CHCl3 when it saturates the air at 27C?arrow_forwardArrange the following substances in order of increasing strength of crystal forces: CO2, KCl, H2O, N2, CaO.arrow_forwardThe phase diagram of a hypothetical substance is (a) Estimate the normal boiling point and freezing point ofthe substance. (b) What is the physical state of the substanceunder the following conditions? (i) T = 150 K, P = 0.2 atm;(ii) T = 100 K, P = 0.8 atm; (iii) T = 300 K, P = 1.0 atm.(c) What is the triple point of the substance? [Section 11.6]arrow_forward
- 1.) The vapor pressure of benzene, C6H6, is 40.1 mmHg at 7.60°C. What is the vapor pressure at 60.6°C if theΔHvap is 31.0 kJ/mol?arrow_forwardThe molar enthalpy of vaporization of hexane (C6H14) is 28.9 kJ/mol, and its normal boiling point is 68.73 °C. What is the vapor pressure of hexane at 25.00 °C?arrow_forward(a) Consider a substance where the intermolecular forces hold the molecules in fixed rigid positions. What is the process called when enough heat has been added to the substance so that the molecules begin to flow? (b) Consider a substance where the intermolecular forces hold the molecules in close contact with each other, but the molecules can flow. What is the process called when enough heat has been added to the substance so that the molecules escape each other? (c) Consider a substance where the intermolecular forces hold the molecules in fixed rigid positions. What is the process called when enough heat has been added to the substance so that the molecules can escape each other?arrow_forward
- A 4.7-L sealed bottle containing 0.33 g of liquid ethanol,C₂H₆O, is placed in a refrigerator and reaches equilibrium with its vapor at -11°C. (a) What mass of ethanol is present in the va-por? (b) When the container is removed and warmed to room temperature, 20.°C, will all the ethanol vaporize? (c) How much liquid ethanol would be present at 0.0°C? The vapor pressure of ethanol is 10. torr at -2.3°C and 40. torr at 19°C.arrow_forwardThe Δ?vap of a certain compound is 14.17 kJ·mol−1 and its Δ?vap is 93.89 J·mol−1·K−1. What is the boiling point of this compound?arrow_forwardThe vapor pressure of acetone (C3H,O) at 39.5°C is 400 torr. (a) If the boiling point of acetone is 56.5°C, calculate its enthalpy of vaporization (AH,vap; in kJ/mol). (b) Using calculated (AH,vap and vapor pressure at 39.5, calculate the vapor pressure of acetone at 25°C. (R = 8.314 J/(mol.K))arrow_forward
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