(a) Interpretation: The flowchart for the process needs to be drawn. The composition of the gas existing the furnace, the heat Q ˙ ( kJ/h ) and the rate of steam produced in the boiler needs to be determined. Concept introduction: From the block diagram of the process, we can elaborate composition of each molecule in gas. Steam generation rate can be calculated by energy balance on boiler and rate of heat generation can be found by total energy balance.

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Answer 1

Question

Chapter 9, Problem 9.71P

Interpretation Introduction

(a)

Interpretation:

The flowchart for the process needs to be drawn. The composition of the gas existing the furnace, the heat Q˙(kJ/h) and the rate of steam produced in the boiler needs to be determined.

Concept introduction:

From the block diagram of the process, we can elaborate composition of each molecule in gas. Steam generation rate can be calculated by energy balance on boiler and rate of heat generation can be found by total energy balance.

Interpretation Introduction

(b)

Interpretation:

The temperature of the entered air in the furnace and the rate of production of steam (kg/h) needs to be determined.

Concept introduction:

In this part, first we have to calculate total enthalpy balance or steam generation rate. Then energy balance on air preheater.By comparing both the quantites we can calculate the temperature of the air entering into the furnace.

Interpretation Introduction

(c)

Interpretation:

Write the significance of air preheahing and reason for using combustion gases as heating media in boiler.

Concept introduction:

In this question we have to describe about working of air preheater and its effect on overall system performance.Air preheater eliminates heat loss of exhaust gases and increases efficiency.

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The boiler in an apartment building uses propane (C3H8) to heat water that circulates throughout the building as steam. 1.00 m'/s of propane gas at 25°C and 1 atm is combusted with 10% excess air at 25°C and 1 atm. After all of the propane is combusted, the product gas contains a 10.0:1 molar ratio of CO2 to CO and leaves the boiler at 25°C. Heat from the boiler is transferred to a pure water stream at 50°C and 1.0 bar, which is converted into saturated steam at 20 bar, with no heat lost to the surroundings in the process. What mass of water is heated in this process? Molecule (Formula) (kJ/mol) -393.5 (g) Carbon dioxide (CO2) Carbon -110.52 (g) monoxide (CO) Hydrogen (H2) Nitrogen (N2) Охуgen (O2) Propane (C;Hs) Hot Water (out). Flue Gas Shutoff Valve - Cold Water (in) -119.8(1) -103.8(g) -285.84(1) Gas Supply Line- Cold Water Shutoff Valve Water (H20) -241.83(g) Temperature / Pressure Relief Valve Water Line Overflow Pipe. Tank Insulation - Dip Tube Drain Valve Gas Burner Control-…

A gaseous fuel containing methane and ethane is burned with excess air. The fuel enters the furnace at 25°C and 1 atm, and the air enters at 200°C and 1 atm. The stack gas leaves the furnace at 800°C and 1 atm and contains 5.32 mole% CO2, 1.60% CO, 7.32% O₂, 12.24% H₂O, and the balance ₂. 1. Calculate the molar percentages of methane and ethane in the fuel gas and the percentage excess air fed to the reactor. 2. Calculate the heat (kJ) transferred from the reactor per cubic meter of fuel gas fed. 3. A proposal has been made to lower the feed rate of air to the furnace. State advantages and a drawback of doing so.

The n-butane is converted into isobutane in an isomerization reactor, which operates isothermally at 149°C. Suppose that the reactor is fed with a mixture containing 93% mole of n-butane, 5% isobutane and 2% HCl at 149°C and that a 40% conversion of n-butane is achieved. How much heat in KJ/m3 (STP) of the feed, should be supplied or extracted from the reactor?

Answer 2

Question

Chapter 9, Problem 9.71P

Interpretation Introduction

(a)

Interpretation:

The flowchart for the process needs to be drawn. The composition of the gas existing the furnace, the heat Q˙(kJ/h) and the rate of steam produced in the boiler needs to be determined.

Concept introduction:

From the block diagram of the process, we can elaborate composition of each molecule in gas. Steam generation rate can be calculated by energy balance on boiler and rate of heat generation can be found by total energy balance.

Interpretation Introduction

(b)

Interpretation:

The temperature of the entered air in the furnace and the rate of production of steam (kg/h) needs to be determined.

Concept introduction:

In this part, first we have to calculate total enthalpy balance or steam generation rate. Then energy balance on air preheater.By comparing both the quantites we can calculate the temperature of the air entering into the furnace.

Interpretation Introduction

(c)

Interpretation:

Write the significance of air preheahing and reason for using combustion gases as heating media in boiler.

Concept introduction:

In this question we have to describe about working of air preheater and its effect on overall system performance.Air preheater eliminates heat loss of exhaust gases and increases efficiency.

Expert Solution & Answer

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Check out a sample textbook solution

See solution

Answer 3

Question

Chapter 9, Problem 9.71P

Interpretation Introduction

(a)

Interpretation:

The flowchart for the process needs to be drawn. The composition of the gas existing the furnace, the heat Q˙(kJ/h) and the rate of steam produced in the boiler needs to be determined.

Concept introduction:

From the block diagram of the process, we can elaborate composition of each molecule in gas. Steam generation rate can be calculated by energy balance on boiler and rate of heat generation can be found by total energy balance.

Interpretation Introduction

(b)

Interpretation:

The temperature of the entered air in the furnace and the rate of production of steam (kg/h) needs to be determined.

Concept introduction:

In this part, first we have to calculate total enthalpy balance or steam generation rate. Then energy balance on air preheater.By comparing both the quantites we can calculate the temperature of the air entering into the furnace.

Interpretation Introduction

(c)

Interpretation:

Write the significance of air preheahing and reason for using combustion gases as heating media in boiler.

Concept introduction:

In this question we have to describe about working of air preheater and its effect on overall system performance.Air preheater eliminates heat loss of exhaust gases and increases efficiency.

Expert Solution & Answer

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Check out a sample textbook solution

See solution

Answer 4

Question

Chapter 9, Problem 9.71P

Interpretation Introduction

(a)

Interpretation:

The flowchart for the process needs to be drawn. The composition of the gas existing the furnace, the heat Q˙(kJ/h) and the rate of steam produced in the boiler needs to be determined.

Concept introduction:

From the block diagram of the process, we can elaborate composition of each molecule in gas. Steam generation rate can be calculated by energy balance on boiler and rate of heat generation can be found by total energy balance.

Interpretation Introduction

(b)

Interpretation:

The temperature of the entered air in the furnace and the rate of production of steam (kg/h) needs to be determined.

Concept introduction:

In this part, first we have to calculate total enthalpy balance or steam generation rate. Then energy balance on air preheater.By comparing both the quantites we can calculate the temperature of the air entering into the furnace.

Interpretation Introduction

(c)

Interpretation:

Write the significance of air preheahing and reason for using combustion gases as heating media in boiler.

Concept introduction:

In this question we have to describe about working of air preheater and its effect on overall system performance.Air preheater eliminates heat loss of exhaust gases and increases efficiency.

Expert Solution & Answer

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Check out a sample textbook solution

See solution

Answer 5

Chapter 9, Problem 9.71P

Interpretation Introduction

(a)

Interpretation:

The flowchart for the process needs to be drawn. The composition of the gas existing the furnace, the heat Q˙(kJ/h) and the rate of steam produced in the boiler needs to be determined.

Concept introduction:

From the block diagram of the process, we can elaborate composition of each molecule in gas. Steam generation rate can be calculated by energy balance on boiler and rate of heat generation can be found by total energy balance.

Interpretation Introduction

(b)

Interpretation:

The temperature of the entered air in the furnace and the rate of production of steam (kg/h) needs to be determined.

Concept introduction:

In this part, first we have to calculate total enthalpy balance or steam generation rate. Then energy balance on air preheater.By comparing both the quantites we can calculate the temperature of the air entering into the furnace.

Interpretation Introduction

(c)

Interpretation:

Write the significance of air preheahing and reason for using combustion gases as heating media in boiler.

Concept introduction:

In this question we have to describe about working of air preheater and its effect on overall system performance.Air preheater eliminates heat loss of exhaust gases and increases efficiency.

Answer 6

Chapter 9, Problem 9.71P

Interpretation Introduction

(a)

Interpretation:

The flowchart for the process needs to be drawn. The composition of the gas existing the furnace, the heat Q˙(kJ/h) and the rate of steam produced in the boiler needs to be determined.

Concept introduction:

From the block diagram of the process, we can elaborate composition of each molecule in gas. Steam generation rate can be calculated by energy balance on boiler and rate of heat generation can be found by total energy balance.

Answer 7

Chapter 9, Problem 9.71P

Interpretation Introduction

(a)

Interpretation:

The flowchart for the process needs to be drawn. The composition of the gas existing the furnace, the heat Q˙(kJ/h) and the rate of steam produced in the boiler needs to be determined.

Concept introduction:

From the block diagram of the process, we can elaborate composition of each molecule in gas. Steam generation rate can be calculated by energy balance on boiler and rate of heat generation can be found by total energy balance.

Answer 8

Interpretation Introduction

(b)

Interpretation:

The temperature of the entered air in the furnace and the rate of production of steam (kg/h) needs to be determined.

Concept introduction:

In this part, first we have to calculate total enthalpy balance or steam generation rate. Then energy balance on air preheater.By comparing both the quantites we can calculate the temperature of the air entering into the furnace.

Answer 9

Interpretation Introduction

(b)

Interpretation:

The temperature of the entered air in the furnace and the rate of production of steam (kg/h) needs to be determined.

Concept introduction:

In this part, first we have to calculate total enthalpy balance or steam generation rate. Then energy balance on air preheater.By comparing both the quantites we can calculate the temperature of the air entering into the furnace.

Answer 10

Interpretation Introduction

(c)

Interpretation:

Write the significance of air preheahing and reason for using combustion gases as heating media in boiler.

Concept introduction:

In this question we have to describe about working of air preheater and its effect on overall system performance.Air preheater eliminates heat loss of exhaust gases and increases efficiency.

Answer 11

Interpretation Introduction

(c)

Interpretation:

Write the significance of air preheahing and reason for using combustion gases as heating media in boiler.

Concept introduction:

In this question we have to describe about working of air preheater and its effect on overall system performance.Air preheater eliminates heat loss of exhaust gases and increases efficiency.

Answer 12

Expert Solution & Answer

Answer 13

Expert Solution & Answer

Answer 14

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Answer 15

Ch. 9 - The standard heat of the reaction...Ch. 9 - Prob. 9.2P Ch. 9 - Prob. 9.3P Ch. 9 - The standard heat of the reaction...Ch. 9 - Prob. 9.5P Ch. 9 - Prob. 9.6P Ch. 9 - Prob. 9.7P Ch. 9 - Prob. 9.8P Ch. 9 - The standard heat of combustion of gaseous ethane...Ch. 9 - The standard heat of combustion (AH°) of liquid...

Solution Summary: The author explains the flowchart for the process. The composition of the gas existing the furnace, the heat and the rate of steam produced in the boiler needs to be determined.

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Chapter 9 Solutions