Determine the dewpoint temperature of the mixture and the composition of the first condensate if a system is condensed at constant pressure. Concept Introduction : At dew point of the system, the gas phase composition (y) remains the same as the overall composition of the system (z) because at the dew point, a small droplet of the liquid will form which has the negligible composition. z A = y A z B = y B z C = y C In condensation, the layer which has less dew point temperature, will come later and vice versa.

Question

At a Pressure of 200 mm Hg, match the substance with the boiling temperature. 69.50°C 1. Benzene 1.92°C 2. Toluene 41.94°C 3. n-Pentane 4. n-Hexane 31.61°C

Answer 1

Question

Chapter 15, Problem 15.14P

(a)

Interpretation Introduction

Interpretation :

Determine the dewpoint temperature of the mixture and the composition of the first condensate if a system is condensed at constant pressure.

Concept Introduction :

At dew point of the system, the gas phase composition (y) remains the same as the overall composition of the system (z) because at the dew point, a small droplet of the liquid will form which has the negligible composition.

zA=yAzB=yBzC=yC

In condensation, the layer which has less dew point temperature, will come later and vice versa.

(b)

Interpretation Introduction

Interpretation :

Determine the temperature at which the second liquid phase appears and its initial composition.

Concept Introduction :

After the further condensation of mixture, the vapor composition of water will change but the heptane and pentane have same composition as before. So, at the temperature where first drop of hydrocarbon layer will show up, the following ratio shall be valid

y2y3=z2z3

(c)

Interpretation Introduction

Interpretation :

Determine the bubblepoint temperature and the composition of the last bubble of the vapor.

Concept Introduction :

At bubble point of the system, the liquid phase composition (y) remains the same as the overall composition of the system (z) because at the bubble point, a small droplet of the bubbleremains in the system after the condensation which has the negligible composition and for two immiscible layers mixture we already know that x1=1 and x2+x3=1 . Hence,

x1=1x2=z2z2+z3x3=z3z2+z3

Expert Solution & Answer

Trending nowThis is a popular solution!

See solution

Check out sample textbook solution

Students have asked these similar questions

At a Pressure of 200 mm Hg, match the substance with the boiling temperature. 69.50°C 1. Benzene 1.92°C 2. Toluene 41.94°C 3. n-Pentane 4. n-Hexane 31.61°C

At a Pressure of 400 mm Hg, match the substance with the boiling temperature. 62.89°C 1. Styrene 122.69°C 2. Ethanol 3. Toluene 89.48°C 4. Benzene 60.61°C

8. A gas is admitted at a rate of 0.015 m³s-¹ to a vertical glass pipe with an inside diameter of 50 mm. The gas bubbles that form travel with a velocity of 32 ms-¹. Determine the gas void fraction and the velocity of the liquid if the volumetric flow is 2.5 x 10-5 m³s-1. Answer: 0.24, 1.7 ms-1 9 Characterise the main concepts of a homogeneous flow model sepa-