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Which of the following is not correct?
- a)Dissolution of NH4Cl in excess of water is an endothermic process
- b)Neutralisation process is always exothermic
- c)The absolute value of enthalpy (H) can be determined experimentally
- d)The heat of reaction at constant volume is denoted by Δ E
Correct answer is option 'C'. Can you explain this answer?
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Which of the following is not correct?a)Dissolution of NH4Cl in excess...
Explanation:
Experimental Determination of Enthalpy:
The absolute value of enthalpy (H) cannot be directly determined experimentally. What can be measured experimentally is the change in enthalpy (ΔH) during a chemical reaction or a physical process. By measuring the heat flow (q) into or out of a system under constant pressure conditions, the change in enthalpy can be calculated using the equation ΔH = q.
Endothermic and Exothermic Processes:
- Dissolution of NH4Cl in excess water is an endothermic process because it requires energy to break the bonds between NH4+ and Cl- ions in the solid NH4Cl.
- Neutralization process is not always exothermic; it can be exothermic or endothermic depending on the specific reactants involved. For example, the neutralization of a strong acid with a strong base is typically exothermic, while the neutralization of a weak acid with a strong base can be endothermic.
Heat of Reaction at Constant Volume:
The heat of reaction at constant volume is denoted by ΔE, where ΔE represents the change in internal energy of a system during a reaction or a process that occurs at constant volume. It is different from the enthalpy change (ΔH), which is measured under constant pressure conditions.
Experimental Determination of Enthalpy:
The absolute value of enthalpy (H) cannot be directly determined experimentally. What can be measured experimentally is the change in enthalpy (ΔH) during a chemical reaction or a physical process. By measuring the heat flow (q) into or out of a system under constant pressure conditions, the change in enthalpy can be calculated using the equation ΔH = q.
Endothermic and Exothermic Processes:
- Dissolution of NH4Cl in excess water is an endothermic process because it requires energy to break the bonds between NH4+ and Cl- ions in the solid NH4Cl.
- Neutralization process is not always exothermic; it can be exothermic or endothermic depending on the specific reactants involved. For example, the neutralization of a strong acid with a strong base is typically exothermic, while the neutralization of a weak acid with a strong base can be endothermic.
Heat of Reaction at Constant Volume:
The heat of reaction at constant volume is denoted by ΔE, where ΔE represents the change in internal energy of a system during a reaction or a process that occurs at constant volume. It is different from the enthalpy change (ΔH), which is measured under constant pressure conditions.
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Which of the following is not correct?a)Dissolution of NH4Cl in excess of water is an endothermic processb)Neutralisation process is always exothermicc)The absolute value of enthalpy (H) can be determined experimentallyd)The heat of reaction at constant volume is denoted by Δ ECorrect answer is option 'C'. Can you explain this answer?
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Which of the following is not correct?a)Dissolution of NH4Cl in excess of water is an endothermic processb)Neutralisation process is always exothermicc)The absolute value of enthalpy (H) can be determined experimentallyd)The heat of reaction at constant volume is denoted by Δ ECorrect answer is option 'C'. Can you explain this answer? for JEE 2024 is part of JEE preparation. The Question and answers have been prepared according to the JEE exam syllabus. Information about Which of the following is not correct?a)Dissolution of NH4Cl in excess of water is an endothermic processb)Neutralisation process is always exothermicc)The absolute value of enthalpy (H) can be determined experimentallyd)The heat of reaction at constant volume is denoted by Δ ECorrect answer is option 'C'. Can you explain this answer? covers all topics & solutions for JEE 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which of the following is not correct?a)Dissolution of NH4Cl in excess of water is an endothermic processb)Neutralisation process is always exothermicc)The absolute value of enthalpy (H) can be determined experimentallyd)The heat of reaction at constant volume is denoted by Δ ECorrect answer is option 'C'. Can you explain this answer?.
Which of the following is not correct?a)Dissolution of NH4Cl in excess of water is an endothermic processb)Neutralisation process is always exothermicc)The absolute value of enthalpy (H) can be determined experimentallyd)The heat of reaction at constant volume is denoted by Δ ECorrect answer is option 'C'. Can you explain this answer? for JEE 2024 is part of JEE preparation. The Question and answers have been prepared according to the JEE exam syllabus. Information about Which of the following is not correct?a)Dissolution of NH4Cl in excess of water is an endothermic processb)Neutralisation process is always exothermicc)The absolute value of enthalpy (H) can be determined experimentallyd)The heat of reaction at constant volume is denoted by Δ ECorrect answer is option 'C'. Can you explain this answer? covers all topics & solutions for JEE 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which of the following is not correct?a)Dissolution of NH4Cl in excess of water is an endothermic processb)Neutralisation process is always exothermicc)The absolute value of enthalpy (H) can be determined experimentallyd)The heat of reaction at constant volume is denoted by Δ ECorrect answer is option 'C'. Can you explain this answer?.
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