CH3CH2CH2CH2CH2CH2CH2CH3, Octane has a vapor pressure of 13.95 torr at 25°C and a vapor pressure of 144.78 torr at 75°C. From the Clausius-Claypeyron equation the following equation can be derived. P1 AHpap R T2 T, P2 In Calculate the heat of vaporization of octane.

CH3CH2CH2CH2CH2CH2CH2CH3, Octane has a vapor pressure of 13.95 torr at 25°C and a vapor pressure of 144.78 torr at 75°C. From the Clausius-Claypeyron equation the following equation can be derived. P1 AHpap R T2 T, P2 In Calculate the heat of vaporization of octane.

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

See similar textbooks

Related questions

Q: 34.6 °C 78.3 °C 100 °C 800 760 Normal boiling point 600 Diethyl ether Water Ethyl alcohol (ethanol)…

A: The intermolecular forces can be determined using vapour pressure.

Q: Ethanol, with AHvan = 40.5 kJ mol1, has a higher AHvap than methanol, which is 35.2 kJ mol1, due to…

A: Given data,∆Hvap for ethanol=40.5kJ/molInitial pressure (P1)=0.0992atmInitial…

Q: Ethanol (C2H6O; P° = 59.02 torr at 25 °C) and acetone (C3H6O; P° = 225.02 torr at 25 °C) are liquids…

A: Given that - Ethanol as solute (C2H6O; P° = 59.02 torr at 25 °C) Acetone as solvent (C3H6O; P° =…

Q: The phase diagram shows the change in molar enthalpy as the molar volume changes. True False

A: Phase diagram - It show phase change of a substance at different temperature and pressure. A graph…

Q: The vapor pressure, P, of a certain liquid was measured at two temperatures, T. The data is shown in…

A: The vapor pressure of the liquid is related to the temperature according to the Clausius-Clapeyron…

Q: Substance Chemical Relative BP Relative Pvap Name Formula Water H20 [ Select ] [ Select ] Ethyl…

A: The liquid molecules tend to convert into the vapour phase. In a closed container, the pressure of…

Q: 900 800 - Carbon disulfide 700 600 Methano 500 Ethanol 400 Heptand 300- 200 100 - 20 30 40 50 60 70…

A: Vapour pressure is the pressure exerted by vapour over the surface of liquid at the condition of…

Q: Vapor pressure (mm Hg) 900 800 700 600 500 400 300 200 100 0 Carbon disulfide 10 20 30 °C Methanol…

A: The boiling point of a liquid is the temperature at which liquid's pressure equal to the atmospheric…

Q: The AG° of vaporization for cyclohexane at 298 K and 1.00 atm is -0.2164 kJ/mol. Calculate the…

A: There is a thermodynamic relationship between ∆G° and Equilibrium constant K which help us to find…

Q: Vapor pressure (mm Hg) 900 800 700 600 500 400 300 200 100 0 Carbon disulfide, 10 20 30 Methanol 40…

A: Given, The vapour pressure of chloroform is 400 mm Hg at 42°C.

Q: If a Clausius-Clayperon plot for an organic alcohol yields the following linear fit:…

A: The Clausius-Clayperon plot for alcohol has resulted in the below given linearly fitted equation.y =…

Q: A new column is inserted on the spreadsheet between the T(K) and VP(mmHg) columns for the 1/T…

Q: A certain solid's melting point is 427.15 K at 1.00 atm and 429.26 K at 1.20 MPa. The molar volumes…

A: melting point T1 = 427.15 K at 1.00 atm and melting point T2 = 429.26 K at 1.20 MPa. The molar…

Q: Ethanol, with AHvap = 40.5 kJ mol-¹, has a higher AHvap than methanol, which is 35.2 kJ mol 1, due…

Q: The vapor pressure, P, of a certain liquid was measured at two temperatures, T. The data is shown in…

A: According to Clausius-Clapeyron plot, enthalpy of vaporization can be determined by plotting a graph…

Q: kJ and its normal boiling point is 38. °C. Calculate the vapor pressure of X at 7. The enthalpy of…

A: Enthalpy of vaporization is 27000 J/mol P1 is 1 atm P2 =? T1 is 38°C = 311 K T2 is 7°C = 280 K

Q: Liquid propane (C3H8) is stored in pressurized cylinders to be used as a fuel (for grilling, etc.).…

Q: At the pressure of 2.98 atm, the enthalpy of fusion is 3.59 kJ/mol at freezing point 229.46 K and…

A: Given that, The pressure is P = 2.98 atm, The enthalpy of fusion is ∆Hfus = 3.59 kJ/mol, The…

Q: 2. Toluene has a vapor pressure of 40.4 mm Hg at 4.4°C and 3166.0 mm Hg at 55.2°C. Solve for the…

Q: The vapor pressure, P, of a certain liquid was measured at two temperatures, T. The data is shown in…

A: The objective of the question is to determine the points to be plotted on a graph to find the…

Q: The vapor pressure, P, of a certain liquid was measured at two temperatures, T. The data is shown in…

Q: The vapor pressure of ethanol, CH3CH2OHCH3CH2OH, at 25.0 °C25.0 °C is 7.87 kPa7.87 kPa. If 2.01…

A: Solution In physical science, perfect gas law could be a well-defined approximation of the behavior…

Q: The smell of fresh cut pine is due in part to the cyclic alkene pinene (136.24 g/mol) whose carbon…

A: Enthalpy of vaporization , ∆Hvap = 45.4 kJ/molPartial Pressure , P1 at temp, T1 = 156 ºC = ( 156 +…

Q: The vapor pressure, P, of a certain liquid was measured at two temperatures, T. The data is shown in…

A: Plot of ln(P) Vs 1/T, to determine the enthalpy of vaporisation.

Q: The enthalpy of vaporization of Substance X is 23.0 Round your answer to 2 significant digits. 0 atm…

A: Enthalpy of vaporisation of substance X, ΔHvap = 23.0 kJ/mol…

Q: Use the information in the figure below to estimate the boiling point (in °C) of water in…

A: The objective of the question is to calculate the boiling point of water in degree celsius if…

Q: Nacl(1), H2(1), C2H4(I), CH3OH(1) With these molecules, What is the order for highest to lowest…

A: The order for highest to lowest vapor pressure has to be given.

Q: The vapor pressure of liquid diethyl ether, C2H5OC2H5, is 100. mm Hg at 262 K. A 0.112 g sample of…

A: Given: Mass of diethyl ether = 0.112 g. Temperature = 262 K Volume of vessel = 400 mL = 0.400 L…

Q: The standard boiling point of pure toluene is 384 K. At 384 K, the equilibrium vapor pressure of…

A: At normal boiling point for any liquid vapor pressure becomes 1.01325 bar.

Q: The formula that relates vapor pressure and temperature is called the Clausius-Clapeyron 2.) The…

Q: Diethyl ether, CH;OC2Hs, is a component in some hair sprays, partly because it evaporates very…

A: Molar volume = 103.9 cm3 Temperature = 25°C

Q: 5. Using the trendline on the graph, calculate the enthalpy of vaporization (AHvap) of water. ( R =…

A: According to the clausius clapeyron equation, => ln(P) = -ΔHvapR1T + C where P = pressure ΔHvap…

Q: The vapor pressure of methanol (CH₃OH) at 25°C is 127.2 torr. A 6.25-g sample of methanol is placed…

A: Mass of Methanol (m) = 0.658 g

Q: Determine the enthalpy of vaporization for this substance. ΔHvap =

A: The gradient of the line lnP vs 1/T graph gives the value of ∆Hvap.

Q: How much heat is required to change 225g of ice at 205K into liquid water at 305K? Remember that…

A: The heat required to change 225g of ice at 205K into liquid water at 305K can be found from the…

Q: Gasoline is primarly a mixture of hydrocarbons and is sold with an octane rating that is based on a…

A: Vapor pressure is defined as the pressure of vapors present on the surface of liquid at a particular…

Q: Hydroquinone is an antioxidant that is also used as a photographic reducer and developer. The normal…

Q: The temperature dependence of the vapor pressure of solid sulfur dioxide can be approximately…

Q: The equilibrium vapor pressure of the liquid of a pure substance becomes doubled when the…

A: Given data is as follows: The equilibrium vapor pressure of the substance P1 = P T1=25.4…

Q: QUESTION 4 000 Arrange the following in order of increasing solubility in water: C₂H5OH; CO2; N₂O.…

A: we have to arrange the given molecules in the order of increasing solubility in water

Q: The vapor pressure of liquid diethyl ether, C2H5 OC2H5, is 40.0 mm Hg at 245 K. A sample of…

A: Condensation can be defined as the process in which liquid substance changes to gaseous…

Q: What is the vapor pressure of a liquid (in mmHg) at 305.13 K if its AHvap = 28.9 kJ/mol and its…

A: Physical chemistry.

Q: From the following phase diagram,give the nature of phases present in the numbered areas and its the…

A: A question based on phase rule that is to be accomplished.

Q: - Boiling point of X (8) at Uludağ (a mountain) is 72 °C. - Y (8) has a higher molar enthalpy of…

A: Since more is the boiling point of any liquid, less will be the volatility of the liquid because…

Question

Gasoline is a mixture of hydrocarbons, a major component of which is octane,
CH;CH2CH,CH2CH2CH2CH2CH3, Octane has a vapor pressure of 13.95 torr at 25°C and a
vapor pressure of 144.78 torr at 75°C. From the Clausius-Claypeyron equation the following
equation can be derived.
AHrap
in p.
P R
T2
Calculate the heat of vaporization of octane.
(Express your answer using two significant figures.)

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

This is a popular solution!

SEE SOLUTION Check out a sample Q&A here

Step 1

VIEW

Step 2

VIEW

Trending now

This is a popular solution!

Step by step

Solved in 2 steps with 1 images

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Learn more about

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

AH vap In(Pvap) R The following graph was obtained for a pure volatile liquid substance. In(Pvap) 4 3 2 -1 -2 -3 -4 == ²( ) + C 0.002 (Note that Pvap is the vapour pressure in atm.) 1/T (K-¹) Determine the enthalpy of vaporization for this substance. Hvap 0.003
Vapor pressure (mm Hg) 900 800 700 600 500 400 300 200 100 0 Carbon disulfide 44 Methanol Ethanol 10 20 30 40 60 70 Temperature (°C) 50 Heptane 80 90 100 110 The vapor pressure of propanol is 400 mm Hg at 82.0 °C. From the plot of vapor pressures vs temperature above, estimate the temperature at which the vapor pressure of ethanol is 400 mm Hg. °℃ The heat of vaporization of propanol would be expected to be than the heat of vaporization of ethanol.
Which of the following statements is FALSE? The vapour pressure of a solid is independent of temperature. Metallic solids can be described as cations in a sea of electrons. Solid benzoic acid, C6H5COOH, is an example of a molecular solid. KBr forms an ionic solid. Network solids have high melting points.
2. Refer to the phase diagram depicted below: if a sample is made by mixing 3 moles of A and 7 moles of B at 50oC, identify the phases exist in the system: one phase: vapor one phase: liquid two phases: vapor and liquid two phases: two liquid
None
Toluene (C7H8) is a common laboratory solvent with ΔH°vap = 38.1 kJ/mol. If the vapor pressure of toluene at 89.6 °C is 380. torr, at what temperature, in °C, will toluene have a vapor pressure of 507 torr?
The vapor pressure of liquid diethyl ether, C2H5OC2H5, is 40.0 mm Hg at 245 K. A sample of C2H5OC2H5 is placed in a closed, evacuated container of constant volume at a temperature of 383 K. It is found that all of the C2H5OC2H5 is in the vapor phase and that the pressure is 49.0 mm Hg. If the temperature in the container is reduced to 245 K, which of the following statements are correct?Choose all that apply. Some of the vapor initially present will condense. No condensation will occur. Liquid diethyl ether will be present. The pressure in the container will be 40.0 mm Hg. Only diethyl ether vapor will be present.
The vapor pressure of the liquid HF is measured at different temperatures. The following vapor pressure data are obtained. Temperature, K P, mmHg 356.6 272.9 289.9 684.0 Calculate the enthalpy of vaporization (AHvap) in kJ/mol for this liquid. Submit kJ/mol Show Approach Hide Tutor Steps
The vapor of liquid bismuth is 400 mm Hg at 1.72x10^3 K. Assuming that it’s molar heat of vaporization is constant at 184 kj/mol, the vapor pressure of liquid Bi is ____ mm Hg at a temperature of 1.70x10^3. The normal boiling point of liquid ethane thiol is 308 K. Assuming that its molar heat of vaporization is constant at 26.7 kj/mol, the boiling pint of C2H5SH when the external pressure is 0.753 atm is ____ K.
Use the plots in the figure here to rank the three liquids in order of increasing enthalpy of vaporization. 760- Pvap (torr) 900 800 700 600 500 400 300 200 100 34.6° Diethyl ether Ethanol 78.4° 100.0⁰ Water 0 10 20 30 40 50 60 70 80 90 100 Temperature (°C) where the lines cross x = 0 In (Pap) Water 1/T (K) left plot: vapor pressure at the highest temperature displayed left plot: vapor pressure at the lowest temperature displayed right plot: relative slopes of the lines Diethyl ether Which aspects of the two sets of plots are useful for ranking the liquids in terms of enthalpy of vaporization? -Ethanol
A can be used to determine the vapor pressure, p* of a pure substance at certain temperatures. T-x diagram phase diagram O P-x diagram Сох chart
The vapor pressure, P, of a certain liquid was measured at two temperatures, T. The data is shown in the table. ТК) Р (КРа) 225 3.40 725 7.58 Keep the pressure units in kilopascals. If you were going to graphically determine the enthalpy of vaporizaton, AHvap, for this liquid, what points would you plot? To avoid rounding errors, use three significant figures in the x-values and four significant figures in the y-values. point 1: x = point 1: y = TOOLS x10 point 2: x = point 2: y = Determine the rise, run, and slope of the line formed by these points. rise = run = slope =