Endothermic And Exothermic Chemical Reactions! Trivia Quiz
Endothermic and Exothermic are chemical reactions that absorb and release heat. An example of an endothermic reaction is photosynthesis. An exemplar of an exothermic reaction is combustion. Specifically, exothermic reactions are those in which heat is given out, while with endothermic reactions, heat is taken in. For this quiz, you will be provided with chemical formulas, and it is up to you to determine its type of reaction. Stay cool and don’t overheat; you will ACE this quiz.
- 1.
C6H12O6 + 6O2 à 6CO2 + 6H2O ∆H = -2803 kJ
- A.
Exothermic
- B.
Endothermic
Correct Answer
A. ExothermicExplanation
The given chemical equation represents the process of cellular respiration, where glucose (C6H12O6) is oxidized to produce carbon dioxide (CO2) and water (H2O) while releasing energy. The negative value of ∆H (-2803 kJ) indicates that the reaction is exothermic, meaning it releases heat energy into the surroundings. Therefore, the correct answer is "Exothermic."Rate this question:
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- 2.
6CO2 + 6H2O à C6H12O6 + 6O2 ∆H = +2803 kJ
- A.
Exothermic
- B.
Endothermic
Correct Answer
B. EndothermicExplanation
The given chemical equation represents the process of photosynthesis, where carbon dioxide (CO2) and water (H2O) are converted into glucose (C6H12O6) and oxygen (O2) in the presence of sunlight. The positive value of ∆H (+2803 kJ) indicates that energy is absorbed or taken in during this reaction. This means that the reaction requires an input of energy in order to proceed, making it endothermic.Rate this question:
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- 3.
3NO2 + H2O à 2HNO3 + NO ∆H = - 138 kJ
- A.
Exothermic
- B.
Endothermic
Correct Answer
A. ExothermicExplanation
The given reaction releases heat energy (-138 kJ), which indicates that it is exothermic. In an exothermic reaction, the products have lower energy than the reactants, and the excess energy is released as heat.Rate this question:
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- 4.
Which of the following statements correctly describes an endothermic reaction?
- A.
The reaction releases heat, making the surroundings warmer.
- B.
The reaction absorbs heat, decreasing the temperature of the surroundings.
Correct Answer
B. The reaction absorbs heat, decreasing the temperature of the surroundings.Explanation
An endothermic reaction is characterized by the absorption of heat from the surroundings, which often leads to a decrease in the surrounding temperature. This is because the system (the reaction) needs to absorb energy in the form of heat to proceed, thus drawing heat from the environment, which is felt as a cooling effect. Conversely, exothermic reactions release heat, increasing the temperature of the surroundings. Option B is the correct description of an endothermic reaction.Rate this question:
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- 5.
CH4 + 2 O2 --> CO2 + 2 H20 + 213.2 KJ
- A.
Exothermic
- B.
Endothermic
Correct Answer
A. ExothermicExplanation
The given balanced chemical equation shows that the reaction of methane (CH4) with oxygen (O2) produces carbon dioxide (CO2) and water (H2O) along with the release of 213.2 KJ of energy. This indicates that the reaction is exothermic because it releases heat or energy to the surroundings.Rate this question:
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- 6.
N2(g) + O2(g) + 43 kcal -----> 2 NO(g)
- A.
Exothermic
- B.
Endothermic
Correct Answer
B. EndothermicExplanation
The given reaction involves the formation of nitrogen monoxide (NO) from nitrogen gas (N2) and oxygen gas (O2) with the absorption of 43 kcal of energy. This indicates that the reaction requires an input of energy to occur, making it endothermic.Rate this question:
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- 7.
Which of the following statements correctly describes an endothermic or exothermic reaction?
- A.
An endothermic reaction releases heat to the surroundings, resulting in a temperature increase.
- B.
An exothermic reaction absorbs heat from the surroundings, resulting in a temperature decrease.
- C.
An endothermic reaction absorbs heat from the surroundings, resulting in a temperature decrease.
- D.
An exothermic reaction releases heat to the surroundings, resulting in a temperature decrea
Correct Answer
C. An endothermic reaction absorbs heat from the surroundings, resulting in a temperature decrease.Explanation
An endothermic reaction absorbs heat from the surroundings, which causes the temperature of the surroundings to decrease. This is because the reaction requires energy input to proceed. In contrast, an exothermic reaction releases heat into the surroundings, increasing the temperature. Understanding this difference helps in identifying the type of reaction based on energy exchange with the surroundings.Rate this question:
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- 8.
C3H8(g) + 5 O2(g) à 3 CO2(g) + 4H2O(g) + 2200 kJ
- A.
Exothermic
- B.
Endothermic
Correct Answer
A. ExothermicExplanation
The given chemical equation represents the combustion of propane (C3H8) in the presence of oxygen (O2) to produce carbon dioxide (CO2) and water (H2O), along with the release of 2200 kJ of energy. In an exothermic reaction, energy is released in the form of heat, which is indicated by the negative sign of the enthalpy change (ΔH). Since the equation shows the release of energy (2200 kJ), it suggests that the reaction is exothermic.Rate this question:
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- 9.
- A.
Exothermic
- B.
Endothermic
Correct Answer
A. Exothermic -
- 10.
If a reaction finishes with more energy than it started, it must be a
- A.
Exothermic
- B.
Endothermic
Correct Answer
B. EndothermicExplanation
An endothermic reaction absorbs energy from its surroundings, resulting in a net gain of energy. This means the products of the reaction have more energy than the reactants. Endothermic reactions often feel cold to the touch as they take in heat from their environment. Common examples include photosynthesis in plants and the melting of ice into water.Rate this question:
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Jun 05, 2024Quiz Edited by
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Dec 09, 2014Quiz Created by
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