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Question 1 of 6
1. Question1 pointsCategory: THERMODYNAMICS
Water is heated at atmospheric pressure from 40ºC to 80ºC using two different processes. In process I, the heating is done by a source at 80ºC. In process II, the water is first heated from 40ºC to 60ºC by a source at 60ºC, and then from 60ºC to 80ºC by another source at 80ºC. Identify the correct statement.Correct
Question 2 of 6
2. Question1 pointsCategory: THERMODYNAMICS
The vapour pressure of a pure substance at a temperature T is 30bar. The actual and ideal gas values of g / RT for the saturated vapour at this temperature T and 30 bar are 7.0 and 7.7 respectively. Here, g is the molar Gibbs free energy and R is the universal gas constant.The fugacity of the saturated liquid at these conditions, rounded to 1 decimal place, is ___bar.Correct
Question 3 of 6
3. Question2 pointsCategory: THERMODYNAMICS
The reversible reaction of t-butyl alcohol (TBA) and ethanol (EtOH) to ethylt-butyl ether (ETBE) is
TBA + EtOH ⇔ ETBE + Water
The equilibrium constant for this reaction is Kc =1. Initially, 74 g of TBA is mixed with 100g of aqueous solution containing 46 weight% ethanol. The molecular weights are:74g/mol for TBA. 46g/mol for EtOH, 102g/mol for ETBE, and 18 g/mol for water.The mass of ETBE at equilibrium, rounded to 1 decimal place, is ____g.Correct
Question 4 of 6
4. Question2 pointsCategory: THERMODYNAMICS
The pressure of a liquid is increased isothermally. The molar volume of the liquid decreases from 50.45 ×10-6 m³/mol to 48 × 10-6 m³/mol during this process. The isothermal compressibility of the liquid is 10−9 Pa−¹ , which can be assumed to be independent of pressure.The change in the molar Gibbs free energy of the liquid, rounded to nearest integer, is ___J/mol.Correct
Question 5 of 6
5. Question2 pointsCategory: THERMODYNAMICS
A sparingly soluble gas (solute) is in equilibrium with a solvent at 10 bar. The mole fraction of the solvent in the gas phase is 0.01. At the operating temperature and pressure, the fugacity coefficient of the solute in the gas phase and the Henry’s law constant are 0.92 and 1000 bar, respectively. Assume that the liquid phase obeys Henry’s law.The MOLE PERCENTAGE of the solute in the liquid phase, rounded to 2 decimal places, isCorrect
Question 6 of 6
6. Question1 pointsCategory: THERMODYNAMICS
The volumetric properties of two gases M and N are described by the generalized compressibility chart which expresses the compressibility factor (Z) as a function of reduced pressure and reduced temperature only. The operating pressure (P) and temperature (T) of two gases M and N along with their critical properties ( Pc,Tc) are given in the table below.
Zm and Zn are the compressibility factor of the gases M and N under the given operating conditions respectively.The relation between Zm and Zn isCorrect