You are studying a liquid that you have just synthesized in the laboratory, and you would like to get a rough idea of its enthalpy of J vaporization. Assuming that it reflects Trouton's rule (namely that S≈ 88- .), you measure its normal boiling point and find that it is mol. K vap 368 K. Use this result to estimate AvapH in kJ/mol.
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Solution:
The following expression gives the relation between the entropy change and enthalpy of vaporization at any temperature T.
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- Metal A is in thermal contact with another Metal B. The two metals have the same length and area. If the end of Metal A is held constant at 80°C and the opposite end (which is Metal B) is held at 300°C. What will be the temperature, in °C, at the junction? (Ka = 314 W/m K and Kb = 427 W/m K)A thin walled hollow aluminium cube 1.442m on a side contains 19.2kg of oxygen gas (o2) at 0 degrees C. The molar mass of oxygen gas is 32u. The volume coefficient of expansion, beta, for aluminum is 75x10-6/ degrees C. a) How many moles of oxygen are in the cube? b) what is the absolute pressure inside the cube? (first work out the volume of the cube). express your answer in atmospeheres (1 atm= 1.013x105N/m2) c) If you plae the cube in the over ( a large oven) raise its temp to 250 degrees C what is the volume of the hot cube? Use the formula for expanison V=Vo(1+beta delta T) d) what is the pressure of the oxygen in the warm, expanded aluminum cube? Assume the oxygen is also now at 250 degrees C. Express answer in atmospheres.A tank contains 10.6 g of chlorine gas (Cl₂) at a temperature of 84 °C and an absolute pressure of 6.00 × 105 Pa. The mass per mole of Cl2 is 70.9 g/mol. (a) Determine the volume of the tank. (b) Later, the temperature of the tank has dropped to 32 °C and, due to a leak, the pressure has dropped to 3.00 × 105 Pa. How many grams of chlorine gas have leaked out of the tank? (a) Number i (b) Number Units Units
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- The vapor pressures of the components, A and B, in a binary solution have been modeled and found to obey хара exp(0.75 XB) A A exp(0.75x) where XÃ and are the mole fractions, and PA* and PB* are the vapor pressures of each pure substance at room temperature. (a) If PA* = 0.084 bar and the total pressure of a mixture with XA = 0.40 is 0.125 bars, what is PB*, the vapor pressure of pure B (in bars)? P = X P А P₁ = X_P B QUESTION 14 B B * * Continuation of the previous problem (b) Assuming that the vapor is an ideal gas, what is the mole fraction of component B in the vapor phase?Needs Complete typed solution with 100 % accuracy.The pressure unit 1 torr is comparable to 0.001 bar. In a sample of N₂ at this pressure and a temperature of 300 K, what is the mean free path between collisions in mm (millimeters)? Assume that the cross-section for N₂ molecules is o = 4.50 × 10-19 m².
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