Choose a heating curve for 1 mole of ethanol beginning at 140 K and ending at 380 K. Assume that the values for ethanol given here are constant over the relevant temperature ranges. Vapour/gas Melting Point 159 K 340 Boiling Point 352 K ΔΗ 4.9 kJ - mol 290 ΔΗ 38.6 kJ - mol 1 Liquid 240 111 J. mol. K ! 1 C solid C, liquid 110 J. mol .K 1 190 Cs, gas 78.3 J- mol .K ' Solid 140 10 20 30 40 50 60 70 80 Heat added (kJ/mol) Vapour/gas 340 290 240 Liquid 190 Solid 140 10 20 30 40 50 60 70 80 Heat added (kJ/mol) Temperature (K) Temperature (K)

Choose a heating curve for 1 mole of ethanol beginning at 140 K and ending at 380 K. Assume that the values for ethanol given here are constant over the relevant temperature ranges. Vapour/gas Melting Point 159 K 340 Boiling Point 352 K ΔΗ 4.9 kJ - mol 290 ΔΗ 38.6 kJ - mol 1 Liquid 240 111 J. mol. K ! 1 C solid C, liquid 110 J. mol .K 1 190 Cs, gas 78.3 J- mol .K ' Solid 140 10 20 30 40 50 60 70 80 Heat added (kJ/mol) Vapour/gas 340 290 240 Liquid 190 Solid 140 10 20 30 40 50 60 70 80 Heat added (kJ/mol) Temperature (K) Temperature (K)

Physical Chemistry

2nd Edition

ISBN:9781133958437

Author:Ball, David W. (david Warren), BAER, Tomas

Publisher:Ball, David W. (david Warren), BAER, Tomas

Chapter6: Equilibria In Single-component Systems

Section: Chapter Questions

Problem 6.41E

See similar textbooks

Similar questions

The pressure of the saturated vapor of benzene (vapor in equilibrium with liquid) is 101.32 kPa at 80°C and 4.81 kPa at 5.5°C, respectively. The latter pressure and temperature correspond to the triple point of benzene. Calculate the approximate molar heat of vaporization ∆Hmv of benzene (Clausius - Clapeyron equation).
The vapor pressure of n-heptanol is 84.4 kPa at 443 K and its normal boiling point is It is 448K. Estimate the heat of evaporation of N-heptanol.
If a particular liquid has a normal boiling point of 338.0 K and a vapor pressure of 75.0 mmHg at 285.0 K, determine ∆Hvap for the liquid.
Equation 22.6 defines surface tension in terms of Gibbs energy. Borrowing an analogy from chemical potential, we submit that surface tension can also be defined in terms of enthalpy, internal energy, or Helmholtz energy. Write partial derivatives for those definitions.
What is the change in the boiling point of water at 1000 C per Pa change under atmospheric pressure conditions? The molar enthalpy of vaporization is 40.69 kJ mol-1, the molar volume of liquid water is 0.019 x 10-3 m3 mol-1, and the molar volume of steam is 30.199 x 10-3m3 mol-1, all at 100.000 C and 1.01325 bar. (Hint: change in temperature per change in pressure, dT/dP).
Calculate the enthalpy of vaporization of SO2 at –25°C if the same at its boiling point (i.e. –10°C) be 5950 cal mol–1. Given for SO2, molar heat capacities in liquid and vapor phase are 206 cal K–1 mol–1 and 9.3 cal K–1 mol–1 respectively.
Why would you not expect the saturation vapor pressure to fall zero, even at extremely low temperatures?
In the systems given below determine the number of phases, number of components with names and degrees of freedom using the Gibbs Phase rule. I. S(rhombic) ⇆ S(monoclinic) ⇆ S(liquid) ⇆ S(gas) II. PCl5 (g) ⇆ PCl3 (g) + Cl2 (g) i) PPCl3 = PCl2 ii) PPCl3 ≠ PCl2 (PA – is partial pressure of A)
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. Calculate the normal boiling point and ∆Svaporization at the boiling point and calculate the triple point pressure and temperature.
The normal boiling point of liquid bromoethane is 311k. Assuming that its molar heat of vaporization is constant at 28.7 kj/mol, the boiling point of C2H5Br when the external pressure is 0.698atm is
Fatty acid mixtures can be used as drug release systems by taking advantage of the different thermal properties of the mixture when compared to those of the pure substances. A mixture of two fatty acids, myristic acid (MA) + stearic acid (SA), exhibits the following (experimentally determined) phase diagram. Sketch a cooling curve for 64% MA over the temperature range of 68 to 40 o Each time the slope of cooling curve changes, label the approximate temperature, as well as the components and phase (or phases) present in that region of the curve.
A rigid tank contains water vapour at 250oC and an unknown pressure. When the tank is cooled to 195oC, the vapour starts condensing as shown in the figure. Estimate the initial pressure in the tank.