A heat exchanger uses medium pressure steam at 10 bar and 350 C to heat cyclohexane vapor from 100 C up to 275 C as shown in the figure below. The steam is available at a flowrate of 32 kg/h and it condenses completely in the heat exchanger and exits as saturated liquid condensate at 10 bar. a) How much heat (in kW) can be provided by the steam? b) How much cyclohexane can be processed in kg/h? Vapor Cyclohexane T = 100 C P = 1 atm Steam T = 350 C = 10 bar Condensate P Vapor Cyclohexane T = 275 C P = 1 atm P = 10 bar Use given tabulated data for answer

Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Chapter1: Introduction
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A heat exchanger uses medium pressure steam at 10 bar and 350 C to heat cyclohexane vapor from 100 C up to 275 C as shown in the figure below. The steam is available at a flowrate of 32 kg/h and it condenses completely in the heat exchanger and exits as saturated liquid condensate at 10 bar. a) How much heat (in kW) can be provided by the steam? b) How much cyclohexane can be processed in kg/h? Vapor Cyclohexane T = 100 C P = 1 atm Steam T = 350 C = 10 bar Condensate P Vapor Cyclohexane T = 275 C P = 1 atm P = 10 bar

Use given tabulated data for answer .

 

**Table B.2: Heat Capacities**

This table presents the heat capacities for various compounds. It provides the information in three different units: \(C_P\) [kJ/(mol K)], [Btu/(mol °R)], and [cal/(mol K)]. The formula to calculate heat capacity at a specific temperature is provided.

**Formula:**  
\(C_P = E + FT + GT^2 + HT^3 + J/T^2\)

**Example:**  
\(C_P\) [kJ/(mol K)] = 34.760 + 4.360 \(\times\) 10\(^-2\)T - 2.005 \(\times\) 10\(^5\)T\(^-2\)  
where T is in °C.

Additional note indicates that these equations are sufficiently accurate for pressures low enough for the ideal-gas equation of state to apply.

| Range (Temp in °C) | Compound | Formula     | Mol. Wt. | Temp. Unit | State Form | \(E \times 10^5\) | \(F\) | \(G \times 10^3\) | \(H \times 10^6\) | \(J \times 10^5\) |
|--------------------|----------|-------------|----------|------------|------------|------------------|-----|-----------------|-----------------|------------------|
| 600-1500           | Acetone  | C\(_3\)H\(_6\)O | 58.08    | °C         | g          | 12.683           | 0   | 31.525          | -3.495          | 0                |
| 0-1200             | Air      |              | 28.97    | °C         | g          | 28.090           | -0.196 | 0.48060         |                 |                  |
| 0-1200             | Argon    | Ar          | 39.948   | °C         | g          | 20.786           | 4.850 | 0               |                 |                  |
|                                                        |            |            |                  |      | 0.016           | 0               |                  |                  |
| 10-2000            | Column 1 | 1           |          |            |
Transcribed Image Text:**Table B.2: Heat Capacities** This table presents the heat capacities for various compounds. It provides the information in three different units: \(C_P\) [kJ/(mol K)], [Btu/(mol °R)], and [cal/(mol K)]. The formula to calculate heat capacity at a specific temperature is provided. **Formula:** \(C_P = E + FT + GT^2 + HT^3 + J/T^2\) **Example:** \(C_P\) [kJ/(mol K)] = 34.760 + 4.360 \(\times\) 10\(^-2\)T - 2.005 \(\times\) 10\(^5\)T\(^-2\) where T is in °C. Additional note indicates that these equations are sufficiently accurate for pressures low enough for the ideal-gas equation of state to apply. | Range (Temp in °C) | Compound | Formula | Mol. Wt. | Temp. Unit | State Form | \(E \times 10^5\) | \(F\) | \(G \times 10^3\) | \(H \times 10^6\) | \(J \times 10^5\) | |--------------------|----------|-------------|----------|------------|------------|------------------|-----|-----------------|-----------------|------------------| | 600-1500 | Acetone | C\(_3\)H\(_6\)O | 58.08 | °C | g | 12.683 | 0 | 31.525 | -3.495 | 0 | | 0-1200 | Air | | 28.97 | °C | g | 28.090 | -0.196 | 0.48060 | | | | 0-1200 | Argon | Ar | 39.948 | °C | g | 20.786 | 4.850 | 0 | | | | | | | | | 0.016 | 0 | | | | 10-2000 | Column 1 | 1 | | |
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