LPG (liquefied petroleum gas) holds advantages over wood as a domestic fuel for several compelling reasons: 1. Cleaner Burning: LPG combustion is cleaner, emitting fewer pollutants like particulate matter and harmful gases, enhancing indoor air quality and reducing health risks compared to wood burnRead more
LPG (liquefied petroleum gas) holds advantages over wood as a domestic fuel for several compelling reasons:
1. Cleaner Burning: LPG combustion is cleaner, emitting fewer pollutants like particulate matter and harmful gases, enhancing indoor air quality and reducing health risks compared to wood burning.
2. Convenience and Accessibility: LPG is readily available, portable, and easier to control than wood. It eliminates the laborious tasks of wood gathering, chopping, and storage, making it more convenient for household heating and cooking needs.
3. Consistency and Dependability: LPG provides consistent heat without variations in quality or moisture content, ensuring a more dependable and constant energy source than wood.
4. Environmental Impact: Wood burning contributes to deforestation. LPG usage reduces this impact by minimizing the pressure on forests, curbing deforestation and forest degradation.
5. Safety Measures: LPG poses fewer safety hazards in terms of handling, storage, and combustion compared to wood stoves or open fires, thereby reducing the risks of accidents, burns, or carbon monoxide exposure.
6. Efficiency: LPG appliances often boast higher energy conversion efficiency than traditional wood-burning stoves, utilizing the fuel’s energy content more effectively.
Collectively, LPG emerges as a preferred domestic fuel over wood due to its cleanliness, convenience, reliability, reduced environmental impact, safety considerations, and higher efficiency in catering to household energy requirements.
Paper itself catches fire easily due to its combustible nature and low ignition temperature. However, when enveloping an aluminum pipe, it becomes less prone to ignition for several reasons: 1. Heat Conductivity: Aluminum is an exceptional heat conductor. Wrapping paper around the pipe enables efficRead more
Paper itself catches fire easily due to its combustible nature and low ignition temperature. However, when enveloping an aluminum pipe, it becomes less prone to ignition for several reasons:
1. Heat Conductivity: Aluminum is an exceptional heat conductor. Wrapping paper around the pipe enables efficient heat dissipation, preventing the paper from reaching the critical temperature required for combustion.
2. Insulating Barrier: The aluminum surface acts as a protective barrier between the paper and potential heat sources, minimizing direct contact with sparks or flames that could ignite the paper.
3. Oxygen Restriction: Tightly wrapping paper around the aluminum pipe can limit the availability of oxygen, a crucial element for combustion, hindering the paper’s ignition process.
4. Surface Modification: Altering the paper’s surface area and thickness by wrapping it around the pipe changes its susceptibility to immediate ignition by reducing exposure to external ignition sources.
5. Protective Shield: The aluminum pipe serves as a shield, shielding the paper from direct contact with heat sources, offering an added layer of protection against rapid combustion.
In essence, the aluminum pipe, by dissipating heat, providing insulation, restricting oxygen, altering surface features, and acting as a protective shield, significantly reduces the likelihood of the paper catching fire compared to when it is exposed independently.
The unit used to express the calorific value of a fuel is "joules per kilogram" (J/kg) or "kilojoules per kilogram" (kJ/kg) in the International System of Units (SI). Alternatively, in specific systems of measurement, it might be indicated in "calories per gram" (cal/g) or "kilocalories per gram" (kRead more
The unit used to express the calorific value of a fuel is “joules per kilogram” (J/kg) or “kilojoules per kilogram” (kJ/kg) in the International System of Units (SI). Alternatively, in specific systems of measurement, it might be indicated in “calories per gram” (cal/g) or “kilocalories per gram” (kcal/g).
Carbon dioxide (CO₂) effectively controls fires due to its specific properties: 1. Suffocation Effect: CO₂ displaces oxygen, forming a layer over the fire that suffocates it. By replacing oxygen with CO₂, the fire lacks the necessary oxygen concentration to sustain combustion. 2. Oxygen Reduction: CRead more
Carbon dioxide (CO₂) effectively controls fires due to its specific properties:
1. Suffocation Effect: CO₂ displaces oxygen, forming a layer over the fire that suffocates it. By replacing oxygen with CO₂, the fire lacks the necessary oxygen concentration to sustain combustion.
2. Oxygen Reduction: CO₂ lowers the surrounding oxygen levels, preventing the fire from maintaining the oxygen needed for continued burning, effectively halting the combustion process.
3. Cooling Properties: Upon discharge, CO₂ expands rapidly, absorbing heat and creating a cooling effect. This action reduces the temperature of the fuel and the fire’s surroundings, impeding the fire’s ability to sustain itself.
4. Chemical Interruption: CO₂ can interfere with the combustion chain reaction, disrupting the process necessary for the fire’s propagation, acting as a chemical inhibitor.
In summary, carbon dioxide extinguishes fires by smothering flames, reducing oxygen availability, cooling the area, and interrupting the combustion chain reaction, collectively halting the fire’s progression.
The difference in flammability between green and dry leaves is primarily due to their moisture content: 1. Moisture Content: Green leaves contain a higher moisture level, acting as a natural barrier against ignition. The moisture absorbs heat, making it difficult for the leaves to reach their ignitiRead more
The difference in flammability between green and dry leaves is primarily due to their moisture content:
1. Moisture Content: Green leaves contain a higher moisture level, acting as a natural barrier against ignition. The moisture absorbs heat, making it difficult for the leaves to reach their ignition temperature.
2. Ignition Temperature: Dry leaves, with lower moisture content, have a lower ignition temperature. They readily ignite as the absence of moisture reduces the energy required for combustion.
3. Heat Absorption: Moisture in green leaves absorbs heat during the initial burning stages, diverting it away from the leaves and impeding rapid temperature increase necessary for ignition.
4. Combustible Components: Dry leaves contain flammable components like cellulose and lignin, enabling rapid oxidation and easier combustion when dry.
In summary, the higher moisture content in green leaves hinders ignition by absorbing heat, while dry leaves, with lower moisture and combustible components, readily reach their ignition temperature, making them more prone to catching fire.
Give reasons: LPG is a better domestic fuel than wood.
LPG (liquefied petroleum gas) holds advantages over wood as a domestic fuel for several compelling reasons: 1. Cleaner Burning: LPG combustion is cleaner, emitting fewer pollutants like particulate matter and harmful gases, enhancing indoor air quality and reducing health risks compared to wood burnRead more
LPG (liquefied petroleum gas) holds advantages over wood as a domestic fuel for several compelling reasons:
1. Cleaner Burning: LPG combustion is cleaner, emitting fewer pollutants like particulate matter and harmful gases, enhancing indoor air quality and reducing health risks compared to wood burning.
2. Convenience and Accessibility: LPG is readily available, portable, and easier to control than wood. It eliminates the laborious tasks of wood gathering, chopping, and storage, making it more convenient for household heating and cooking needs.
3. Consistency and Dependability: LPG provides consistent heat without variations in quality or moisture content, ensuring a more dependable and constant energy source than wood.
4. Environmental Impact: Wood burning contributes to deforestation. LPG usage reduces this impact by minimizing the pressure on forests, curbing deforestation and forest degradation.
5. Safety Measures: LPG poses fewer safety hazards in terms of handling, storage, and combustion compared to wood stoves or open fires, thereby reducing the risks of accidents, burns, or carbon monoxide exposure.
6. Efficiency: LPG appliances often boast higher energy conversion efficiency than traditional wood-burning stoves, utilizing the fuel’s energy content more effectively.
Collectively, LPG emerges as a preferred domestic fuel over wood due to its cleanliness, convenience, reliability, reduced environmental impact, safety considerations, and higher efficiency in catering to household energy requirements.
See lessGive reasons: Paper by itself catches fire easily whereas a piece of paper wrapped around an aluminum pipe does not.
Paper itself catches fire easily due to its combustible nature and low ignition temperature. However, when enveloping an aluminum pipe, it becomes less prone to ignition for several reasons: 1. Heat Conductivity: Aluminum is an exceptional heat conductor. Wrapping paper around the pipe enables efficRead more
Paper itself catches fire easily due to its combustible nature and low ignition temperature. However, when enveloping an aluminum pipe, it becomes less prone to ignition for several reasons:
1. Heat Conductivity: Aluminum is an exceptional heat conductor. Wrapping paper around the pipe enables efficient heat dissipation, preventing the paper from reaching the critical temperature required for combustion.
2. Insulating Barrier: The aluminum surface acts as a protective barrier between the paper and potential heat sources, minimizing direct contact with sparks or flames that could ignite the paper.
3. Oxygen Restriction: Tightly wrapping paper around the aluminum pipe can limit the availability of oxygen, a crucial element for combustion, hindering the paper’s ignition process.
4. Surface Modification: Altering the paper’s surface area and thickness by wrapping it around the pipe changes its susceptibility to immediate ignition by reducing exposure to external ignition sources.
5. Protective Shield: The aluminum pipe serves as a shield, shielding the paper from direct contact with heat sources, offering an added layer of protection against rapid combustion.
In essence, the aluminum pipe, by dissipating heat, providing insulation, restricting oxygen, altering surface features, and acting as a protective shield, significantly reduces the likelihood of the paper catching fire compared to when it is exposed independently.
See lessName the unit in which the calorific value of a fuel is expressed.
The unit used to express the calorific value of a fuel is "joules per kilogram" (J/kg) or "kilojoules per kilogram" (kJ/kg) in the International System of Units (SI). Alternatively, in specific systems of measurement, it might be indicated in "calories per gram" (cal/g) or "kilocalories per gram" (kRead more
The unit used to express the calorific value of a fuel is “joules per kilogram” (J/kg) or “kilojoules per kilogram” (kJ/kg) in the International System of Units (SI). Alternatively, in specific systems of measurement, it might be indicated in “calories per gram” (cal/g) or “kilocalories per gram” (kcal/g).
See lessExplain how CO₂ is able to control fires.
Carbon dioxide (CO₂) effectively controls fires due to its specific properties: 1. Suffocation Effect: CO₂ displaces oxygen, forming a layer over the fire that suffocates it. By replacing oxygen with CO₂, the fire lacks the necessary oxygen concentration to sustain combustion. 2. Oxygen Reduction: CRead more
Carbon dioxide (CO₂) effectively controls fires due to its specific properties:
1. Suffocation Effect: CO₂ displaces oxygen, forming a layer over the fire that suffocates it. By replacing oxygen with CO₂, the fire lacks the necessary oxygen concentration to sustain combustion.
2. Oxygen Reduction: CO₂ lowers the surrounding oxygen levels, preventing the fire from maintaining the oxygen needed for continued burning, effectively halting the combustion process.
3. Cooling Properties: Upon discharge, CO₂ expands rapidly, absorbing heat and creating a cooling effect. This action reduces the temperature of the fuel and the fire’s surroundings, impeding the fire’s ability to sustain itself.
4. Chemical Interruption: CO₂ can interfere with the combustion chain reaction, disrupting the process necessary for the fire’s propagation, acting as a chemical inhibitor.
In summary, carbon dioxide extinguishes fires by smothering flames, reducing oxygen availability, cooling the area, and interrupting the combustion chain reaction, collectively halting the fire’s progression.
See lessIt is difficult to burn a heap of green leaves but dry leaves catch fire easily. Explain.
The difference in flammability between green and dry leaves is primarily due to their moisture content: 1. Moisture Content: Green leaves contain a higher moisture level, acting as a natural barrier against ignition. The moisture absorbs heat, making it difficult for the leaves to reach their ignitiRead more
The difference in flammability between green and dry leaves is primarily due to their moisture content:
1. Moisture Content: Green leaves contain a higher moisture level, acting as a natural barrier against ignition. The moisture absorbs heat, making it difficult for the leaves to reach their ignition temperature.
2. Ignition Temperature: Dry leaves, with lower moisture content, have a lower ignition temperature. They readily ignite as the absence of moisture reduces the energy required for combustion.
3. Heat Absorption: Moisture in green leaves absorbs heat during the initial burning stages, diverting it away from the leaves and impeding rapid temperature increase necessary for ignition.
4. Combustible Components: Dry leaves contain flammable components like cellulose and lignin, enabling rapid oxidation and easier combustion when dry.
In summary, the higher moisture content in green leaves hinders ignition by absorbing heat, while dry leaves, with lower moisture and combustible components, readily reach their ignition temperature, making them more prone to catching fire.
See less