Chemical Engineering

Using the correlation for the second virial coefficient (Pitzer correlation), find the molar volume of 1-butanol vapour at 511.5 K and 12.2 bar, giving your answer to the nearest cm3/mol. The critical temperature is 563.1 K and the critical pressure of 1-butanol is 44.23 bar. Take R = 8.314 J/mol-K and the acentric factor for 1-butanol as 0.594.

Using the correlation for the second virial coefficient (Pitzer correlation), find the molar volume of 1-butanol vapour at 511.5 K and 12.2 bar, giving your answer to the nearest cm3/mol. The critical temperature is 563.1 K and the critical pressure of 1-butanol is 44.23 bar. Take R = 8.314 J/mol-K and the acentric factor for 1-butanol …

Using the correlation for the second virial coefficient (Pitzer correlation), find the molar volume of 1-butanol vapour at 511.5 K and 12.2 bar, giving your answer to the nearest cm3/mol. The critical temperature is 563.1 K and the critical pressure of 1-butanol is 44.23 bar. Take R = 8.314 J/mol-K and the acentric factor for 1-butanol as 0.594. Read More »

What is the entropy change of the gas, heated in a steady-flow process at approximately atmospheric pressure when 2,500 kJ is added to 15 mol of 1- butene initially at 260ºC?

What is the entropy change of the gas, heated in a steady-flow process at approximately atmospheric pressure when 2,500 kJ is added to 15 mol of 1- butene initially at 260ºC? EXPERT ANSWER The entropy change of the gas can be found using the entropy equation with the help of final temperature, which can be …

What is the entropy change of the gas, heated in a steady-flow process at approximately atmospheric pressure when 2,500 kJ is added to 15 mol of 1- butene initially at 260ºC? Read More »

1)State two common criteria for setting the pressure of a distillation column.2)Suggest two reasons each why distillation columns are run above or below ambient pressure .3)Suggest two reasons why reactors are run at elevated pressures and /or temperatures .Be sure to state clearly which explanation is for elevated pressure and which is elevated temperature.4)Give two reasons why operation of process greater than 250 °C is undesireable .Give one reason each why one would operate a distillation column and reactor at a temperature greater than 250 °C.5)Define ”condition of special concern ” .Define two such conditions ,and state one possible justification for each.6)In the food and drug industries ,many processes used to produce new active ingredients (drugs) or to separete and purify drug and food occurs at vacuum conditions and often at low temperatures (less than at room temperature).What is it about these types of products that requires that these conditions of special concern be used ?

1)State Two Common Criteria For Setting The Pressure Of A Distillation Column 2)Suggest two reasons each why distillation columns are run above or below ambient pressure . 3)Suggest two reasons why reactors are run at elevated pressures and  /or temperatures .Be sure to state clearly which explanation is for elevated pressure and which is elevated temperature. …

1)State two common criteria for setting the pressure of a distillation column.2)Suggest two reasons each why distillation columns are run above or below ambient pressure .3)Suggest two reasons why reactors are run at elevated pressures and /or temperatures .Be sure to state clearly which explanation is for elevated pressure and which is elevated temperature.4)Give two reasons why operation of process greater than 250 °C is undesireable .Give one reason each why one would operate a distillation column and reactor at a temperature greater than 250 °C.5)Define ”condition of special concern ” .Define two such conditions ,and state one possible justification for each.6)In the food and drug industries ,many processes used to produce new active ingredients (drugs) or to separete and purify drug and food occurs at vacuum conditions and often at low temperatures (less than at room temperature).What is it about these types of products that requires that these conditions of special concern be used ? Read More »

1)State two common criteria for setting the pressure of a distillation column.2)Suggest two reasons each why distillation columns are run above or below ambient pressure .3)Suggest two reasons why reactors are run at elevated pressures and /or temperatures .Be sure to state clearly which explanation is for elevated pressure and which is elevated temperature.4)Give two reasons why operation of process greater than 250 °C is undesireable .Give one reason each why one would operate a distillation column and reactor at a temperature greater than 250 °C.5)Define ”condition of special concern ” .Define two such conditions ,and state one possible justification for each.6)In the food and drug industries ,many processes used to produce new active ingredients (drugs) or to separete and purify drug and food occurs at vacuum conditions and often at low temperatures (less than at room temperature).What is it about these types of products that requires that these conditions of special concern be used ?

1)State Two Common Criteria For Setting The Pressure Of A Distillation Column 2)Suggest two reasons each why distillation columns are run above or below ambient pressure . 3)Suggest two reasons why reactors are run at elevated pressures and  /or temperatures .Be sure to state clearly which explanation is for elevated pressure and which is elevated temperature. …

1)State two common criteria for setting the pressure of a distillation column.2)Suggest two reasons each why distillation columns are run above or below ambient pressure .3)Suggest two reasons why reactors are run at elevated pressures and /or temperatures .Be sure to state clearly which explanation is for elevated pressure and which is elevated temperature.4)Give two reasons why operation of process greater than 250 °C is undesireable .Give one reason each why one would operate a distillation column and reactor at a temperature greater than 250 °C.5)Define ”condition of special concern ” .Define two such conditions ,and state one possible justification for each.6)In the food and drug industries ,many processes used to produce new active ingredients (drugs) or to separete and purify drug and food occurs at vacuum conditions and often at low temperatures (less than at room temperature).What is it about these types of products that requires that these conditions of special concern be used ? Read More »

Refrigerant 134a initially at -36°C fills a rigid vessel. The refrigerant is heated until the temperature becomes 25°C and the pressure is 1 bar. There is no work during the process. For the refrigerant, determine the heat transfer per unit mass and the change in specific exergy, each in kJ/kg. Let T0 = 20°C, p0 = 0.1 MPa.

Refrigerant 134a initially at -36°C fills a rigid vessel. The refrigerant is heated until the temperature becomes 25°C and the pressure is 1 bar. There is no work during the process. For the refrigerant, determine the heat transfer per unit mass and the change in specific exergy, each in kJ/kg. Let T0 = 20°C, p0 …

Refrigerant 134a initially at -36°C fills a rigid vessel. The refrigerant is heated until the temperature becomes 25°C and the pressure is 1 bar. There is no work during the process. For the refrigerant, determine the heat transfer per unit mass and the change in specific exergy, each in kJ/kg. Let T0 = 20°C, p0 = 0.1 MPa. Read More »

Problem 3. Compound A diffuses through a 4-cm-long tube and reacts as it diffuses. The equation governing diffusion with reaction is d2A At one end of the tube, there is a large source of A at a concentration of 0.I M. At the other end of the tube there is an adsorbent material that quickly absorbs any A, making the concentration 0 M. If D 1.5 x 10-6 and k 5 x 10-6 s-1, what is the concentration of A as a function of distance using RK4. in the tube? Write a Matlab script that implements the “shooting” method. Perform the integration

EXPERT ANSWER

A gas stream containing 3% A is passed through a packed column to remove 99% of A by absorption in water. The absorber will operate at 25 C and 1 atm, and the gas and liquid rates are to be 20 mole/h ft2 and 100 mole/h ft2 respectively. Mass transfer coefficient and equilibrium data are as follows:

A gas stream containing 3% A is passed through a packed column to remove 99% of A by absorption in water. The absorber will operate at 25 C and 1 atm, and the gas and liquid rates are to be 20 mole/h ft2 and 100 mole/h ft2 respectively. Mass transfer coefficient and equilibrium data are …

A gas stream containing 3% A is passed through a packed column to remove 99% of A by absorption in water. The absorber will operate at 25 C and 1 atm, and the gas and liquid rates are to be 20 mole/h ft2 and 100 mole/h ft2 respectively. Mass transfer coefficient and equilibrium data are as follows: Read More »