BPSC (Bihar) Exam > BPSC (Bihar) Questions > The burning (combustion) of a candle is ____a...
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The burning (combustion) of a candle is ____
- a)Photochemical reaction
- b)Physical change
- c)Endothermic reaction
- d)Exothermic reaction
- e)None of the above/More than one of the above
Correct answer is option 'D'. Can you explain this answer?
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The burning (combustion) of a candle is ____a)Photochemical reactionb)...
- Exothermic reaction
The burning (combustion) of a candle is classified as an exothermic reaction. Here's why:
- Definition of exothermic reaction:
An exothermic reaction is a chemical reaction that releases energy in the form of heat. In this type of reaction, the products have lower energy than the reactants, and the excess energy is released into the surroundings.
- Burning of a candle:
When a candle burns, the wax (fuel) reacts with oxygen in the air to produce carbon dioxide, water vapor, and heat. This process releases energy in the form of heat and light, making it an exothermic reaction.
- Release of energy:
During the combustion of the candle, the chemical bonds in the wax are broken, and new bonds are formed with the oxygen molecules. This rearrangement of bonds releases energy, which is observed as the heat and light given off by the candle flame.
- Characteristics of exothermic reactions:
Exothermic reactions typically involve a decrease in enthalpy (ΔH < 0)="" and="" an="" increase="" in="" temperature="" of="" the="" surroundings.="" the="" burning="" of="" a="" candle="" fits="" these="" characteristics,="" as="" it="" releases="" heat="" energy="" into="" the="" surrounding="" />
In conclusion, the burning of a candle is classified as an exothermic reaction because it releases energy in the form of heat, making the surroundings warmer.
The burning (combustion) of a candle is classified as an exothermic reaction. Here's why:
- Definition of exothermic reaction:
An exothermic reaction is a chemical reaction that releases energy in the form of heat. In this type of reaction, the products have lower energy than the reactants, and the excess energy is released into the surroundings.
- Burning of a candle:
When a candle burns, the wax (fuel) reacts with oxygen in the air to produce carbon dioxide, water vapor, and heat. This process releases energy in the form of heat and light, making it an exothermic reaction.
- Release of energy:
During the combustion of the candle, the chemical bonds in the wax are broken, and new bonds are formed with the oxygen molecules. This rearrangement of bonds releases energy, which is observed as the heat and light given off by the candle flame.
- Characteristics of exothermic reactions:
Exothermic reactions typically involve a decrease in enthalpy (ΔH < 0)="" and="" an="" increase="" in="" temperature="" of="" the="" surroundings.="" the="" burning="" of="" a="" candle="" fits="" these="" characteristics,="" as="" it="" releases="" heat="" energy="" into="" the="" surrounding="" />
In conclusion, the burning of a candle is classified as an exothermic reaction because it releases energy in the form of heat, making the surroundings warmer.
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The burning (combustion) of a candle is ____a)Photochemical reactionb)Physical changec)Endothermic reactiond)Exothermic reactione)None of the above/More than one of the aboveCorrect answer is option 'D'. Can you explain this answer?
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