CHEMISTRY-TEXT
8th Edition
ISBN: 9780134856230
Author: Robinson
Publisher: PEARSON
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Chapter 11, Problem 11.3P
PRACTICE 11.1 The boiling point of ethanol is 78.4 °C, and the enthalpy change for theconversion of liquid to vapor is
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A substance has the following properties:
AHfus 10.0 kJ/mol
AHvap=20.0 kJ/mol
Cp (solid) = 60. J mol-¹ K-¹ Cp (liquid) = 30. J mol-¹ K-¹
Cp (gas) = 60. J mol-¹
K-¹
=
Determine the normal boiling point of a liquid with vapor pressure 63.8 mmHg at 56.50°C, given that its molar heat of vaporization is 43.5 kJ/mol.
Two students measure the vapor pressure of the same unknown organic liquid and compare results. The first student measured a vapor pressure of 630.4 torr at 191 °C, while the second student measured a vapor pressure of 0.5570 atm at 160 °C. What is the ΔH°vap, in kilojoules per mole, for this substance?
Chapter 11 Solutions
CHEMISTRY-TEXT
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
- Chloromethane, CH3CI, arises from microbial fermentation and is found throughout the environment. It is also produced industrially, is used in the manufacture of various chemicals, and has been used as a topical anesthetic. How much energy is required to convert 92.5 g of liquid to a vapor at its boiling point, 24.09 C? (The heat of vaporization of CH3Cl is 21.40 kJ/mol.)arrow_forwardLiquid butane, C4H10, is stored in cylinders to be used as a fuel. Suppose 35.5 g of butane gas is removed from a cylinder. How much heat must be provided to vaporize this much gas? The heat of vaporization of butane is 21.3 kJ/mol.arrow_forwardThe normal boiling point of acetone is 56.1°C and its ΔHvap at its boiling point is 29.1 kJ/mol. What is the vapor pressure (in atm) at 20.2 °C?arrow_forward
- How much energy is required to vaporize 37.8 g of benzene (C6H6, molar mass = 78.0 g/mol) at the boiling point of benzene, 80°C? ΔHvap = 30.8 kJ/molarrow_forwardThe thermodynamic values for Benzene are given below. Boiling Point: Melting Point: Heat of Vaporization: Heat of Fusion: Heat capacity (solid): Heat capacity (liquid): 90.0 J/mol K Heat capacity (gas): 70.0 J/mol K What is the energy released in kJ as a 2.5 mol sample of benzene at 110°C is cooled to 65°C? 13.6 kJ 33.6 kJ 3.4 kJ 5.2 kJ 10.5 kJ 80.0 °C 10.0 °C 10.0 kJ/mol 30.0 kJ/mol 100.0 J/mol Karrow_forwardSuppose some ice at 0ºC is placed into 50.00g of water at 25.5ºC. When the system reaches equilibrium at 0ºC, 15.95 grams of the ice has melted. What is the heat of fusion of ice, Hf?arrow_forward
- What is the vapor pressure of ethanol (in mmHg) at 43.5 °C if its vapor pressure is 400.0 mmHg at 63.5 °C? (AHvap = 39.3 kJ/mol; R = 8.314 J/K mol) ●arrow_forward(specific heat capacity of ice = 2.09 J/g°C, liquid water = 4.18 J/g°C and steam = 2.01 J/g°C, ΔHfus= 6.02 kJ/mol, ΔHvap=40.7 kJ/mol) Calculate q when 0.10 g of solid ice at −75.0°C is converted to liquid water at 10.0°C. (See problem above for needed constants)arrow_forwardCalculate the enthalpy change (in Joules) upon converting 0.2 moles of ice at -8.1 °C to steam at 107.6°C under a constant pressure of 1.0 atm.arrow_forward
- How much heat (in kJ mol–1 to two decimal places) is required to vaporize 2.5 moles of benzene (C6H6; 78.11 g mol–1) at its normal boiling point using the given enthalpy of vaporization? ΔH=30.72 kJ mol-1arrow_forwardConsider the Sublimation of dry ice (solid carbon dioxide). The value of deltaHsub for CO2 is 25.2kj/mol 1) write the balanced chemical equation for the sublimation of CO2 2) Is this reaction "breaking bonds" (intramolecular) or "breaking intermolecular forces" (intermolecular)? What's the difference between the two?arrow_forwardA liquid at 20.0 °C exhibits a vapor pressure of 0.555 atm. The liquid is heated to 60.0 °C. What is the new vapor pressure (in atm to three decimal places) if ΔHvap = 25.595 kJ mol–1?arrow_forward
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