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Engineering and Tech / Thermodynamics: An Engineering Approach 8 / Chapter 15 / Problem 1553

Thermodynamics: An Engineering Approach | 8th Edition | ISBN: 9780073398174 | Authors: Yunus A. Cengel

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Answer: Acetylene gas (C2H2) is burned completely with 20

Chapter 15, Problem 1553

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QUESTION:

Acetylene gas (C2H2) is burned completely with 20 percent excess air during a steady-flow combustion process. The fuel and air enter the combustion chamber at 258C, and the products leave at 1500 K. Determine (a) the airfuel ratio and (b) the heat transfer for this process.

Questions & Answers

QUESTION:

Acetylene gas (C2H2) is burned completely with 20 percent excess air during a steady-flow combustion process. The fuel and air enter the combustion chamber at 258C, and the products leave at 1500 K. Determine (a) the airfuel ratio and (b) the heat transfer for this process.

ANSWER:

Step 1 of 6

Acetylene gas is burned with 20 percent excess air during a steady-flow combustion process.

The AF ratio and the heat transfer are to be determined. Assumptions are

1. Steady operating conditions exist.

2. Air and combustion gases are ideal gases.

3. Kinetic and potential energies are negligible.

4. Combustion is complete.

The molar masses of and air are and , respectively (Table A-1).

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