Concept explainers
Write down the chemical formulae for the combustion of the alkanes in Table 3.2 with n = 2 to n = 8. Determine the mass of CO2 produced per megajoule of energy.
Provide the chemical formula for the combustion of alkanes with
Calculate the mass of
Explanation of Solution
Calculation:
Provide the general equation for the combustion of alkanes as shown below.
Refer to Table 3.2 “Alkane series of hydrocarbons with the formula
Take the name, formula, and the heat combustion values for each alkanes.
Provide the chemical formula for the combustion of alkanes with
n | Name | Formula | Combustion of alkanes | Moles | Moles of alkane |
2 | Ethane | 4 | 2 | ||
3 | Propane | 3 | 1 | ||
4 | Butane | 8 | 2 | ||
5 | Pentane | 5 | 1 | ||
6 | Hexane | 12 | 2 | ||
7 | Heptane | 7 | 7 | ||
8 | Octane | 16 | 2 |
The molecular mass of
Calculate the mass of
Provide the mass of
n | M (alkane) | Heat of combustion (MJ/kg) | |||
2 | 2 | 30 | 2.93 | 51.9 | 0.0565 |
3 | 3 | 44 | 3 | 50.3 | 0.0596 |
4 | 4 | 58 | 3.03 | 49.5 | 0.0612 |
5 | 5 | 72 | 3.06 | 48.7 | 0.0628 |
6 | 6 | 86 | 3.07 | 48.1 | 0.0638 |
7 | 7 | 100 | 3.08 | 48.1 | 0.0640 |
8 | 8 | 114 | 3.09 | 46.8 | 0.0660 |
Want to see more full solutions like this?
Chapter 3 Solutions
Bundle: Sustainable Energy, 2nd + Mindtap Engineering, 1 Term (6 Months) Printed Access Card
Additional Engineering Textbook Solutions
Structural Analysis (10th Edition)
Structural Steel Design (6th Edition)
Elementary Surveying: An Introduction To Geomatics (15th Edition)
Foundation Design: Principles and Practices (3rd Edition)
Materials for Civil and Construction Engineers (4th Edition)
Elementary Surveying (14th Edition)
- The combustion of pure hydrogen by the reaction 2H2+O22H2O produces 142 MJ per kg of hydrogen. Compare the energy per kg of octane and the total energy from the individual combustion of its carbon and hydrogen atoms.arrow_forward(a) Locate, from an appropriate source, the composition for methanol and ethanol. Write down the formulas for the combustion of these two hydrocarbons. (b) Calculate the mass of CO2 produced per kg of methanol and ethanol burned. (c) Locate values for the heat of combustion of methanol and ethanol and determine the mass of CO2 produced per MJ of energy.arrow_forwardThe ideal equation for the combustion of cellulose is C6H10O5 + 6O26O2 + 5H2O. What is a similar idealized equation for pyrolysis? What end products might you expect?arrow_forward
- Cellulose is to be burned in a waste-to- energy fadlity. The chemical equation for cellulose C6 H10O5is the atomic weights of C, H, and O are 12, 1, and 16. respectively. a. Calculate the stoichiometric oxygen necessary for the combustion of cellulose. b. Calculate stoichiometric air.arrow_forwardA 60 MW steam power station has a thermal efficiency of 30%. If the coal burnt has a calorific value of6950 kcal/kg, calculate :(i) the coal consumption per kWh,(ii)the coal consumption per day.arrow_forwardCellulose is to be burned in a waste to energy facility. The chemical equation for cellulose is C6H10O5. The atomic weights of C, H, and O are 12, 1, and 16, respectively. The ideal equation for the combustion of cellulose is C6H10O5 +6O2à6CO2 + 5H2O. Calculate the stoichiometric oxygen necessary for the combustion of cellulose. Calculate the stoichiometric air supply. The air is 23.15% oxygen by weight. If the facility operates at 1.5 tons/hour at 100% excess air. How much air is required?arrow_forward
- A new coal-fired power plant has been built using a sulfur emission control system that is 70 percent efficient. If all of the sulfur oxidizes to SO2 and if the emission of SO2 are lmited to 0.6 lb SO2 per million Btu of heat into the power plant, what maximum percent sulfur content can the fuel have if 15,000 Btu/lb coal is burned?arrow_forwardEnvironmental Engineering When methanol is used to generate hydrogen, it reacts with the following reaction: CH3OH>>>>CO+2H2 The reaction is second order in methanol, and it is observed that 100g of carbon monoxide can be produced in one day in a batch reactor, if you start with 200g of methanol. What is the rate constant for this reaction?arrow_forward
- Solid Waste EngineeringCivil EngineeringISBN:9781305635203Author:Worrell, William A.Publisher:Cengage Learning,