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The internal energy of a system may be changed either by allowing the exchange of heat with the surroundings or by doing work on the system. If the reaction is carried out at a constant volume, pressure-volume work done is zero. We know that qp = qv + ngRT. Internal energy is an extensive property and a state function. The questions from (i) to (iv) consist of an assertion (A) and reason (R). Choose the correct option:
Assertion: Absolute value of internal energy (U) cannot be determined.
Reason: Internal energy is a sum of many types of energies, that depend on several factors.
- a)A and R both are correct and R is the correct explanation of A.
- b)A and R both are correct but R is not the correct explanation of A.
- c)A is true but R is false.
- d)A is false but R is true.
Correct answer is option 'A'. Can you explain this answer?
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The internal energy of a system may be changed either by allowing the...
Internal energy is given by
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Accurate measurement of some forms of energy which contribute to the absolute value of internal energy for a given substance in a given state is impossible. So difference of the initial state and final state is calculated and is denoted by
ΔE = Ef - Ei
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The internal energy of a system may be changed either by allowing the...
Assertion: Absolute value of internal energy (U) cannot be determined.
Reason: Internal energy is a sum of many types of energies that depend on several factors.
Explanation:
The assertion states that the absolute value of internal energy (U) cannot be determined, while the reason states that internal energy is a sum of many types of energies that depend on several factors.
Internal Energy and its Determination:
- Internal energy is the sum of all the microscopic kinetic and potential energies of the molecules in a system. It includes the energies associated with molecular motion, rotation, vibration, and intermolecular forces.
- Since internal energy is a state function, its change can be determined by measuring the heat (q) and work (w) exchanged between the system and its surroundings.
- The change in internal energy (ΔU) of a system can be calculated using the first law of thermodynamics: ΔU = q + w, where q is the heat exchanged and w is the work done on or by the system.
- However, determining the absolute value of internal energy requires knowing its value at a specific reference point, which is arbitrary. Hence, the absolute value of internal energy cannot be determined.
Reasoning:
- The reason given for the assertion is correct. Internal energy is indeed a sum of many types of energies that depend on several factors. The internal energy of a system depends on the nature, composition, and state of the system, as well as external factors such as temperature and pressure.
- The kinetic and potential energies associated with molecular motion, rotation, and vibration contribute to the internal energy. Additionally, the intermolecular forces and interactions between molecules also contribute to the internal energy.
- These factors make it impossible to determine the absolute value of internal energy, as it is dependent on various factors that may vary from system to system.
Conclusion:
Based on the explanation and reasoning above, it can be concluded that both the assertion and reason are correct, and the reason is indeed the correct explanation for the assertion.
Reason: Internal energy is a sum of many types of energies that depend on several factors.
Explanation:
The assertion states that the absolute value of internal energy (U) cannot be determined, while the reason states that internal energy is a sum of many types of energies that depend on several factors.
Internal Energy and its Determination:
- Internal energy is the sum of all the microscopic kinetic and potential energies of the molecules in a system. It includes the energies associated with molecular motion, rotation, vibration, and intermolecular forces.
- Since internal energy is a state function, its change can be determined by measuring the heat (q) and work (w) exchanged between the system and its surroundings.
- The change in internal energy (ΔU) of a system can be calculated using the first law of thermodynamics: ΔU = q + w, where q is the heat exchanged and w is the work done on or by the system.
- However, determining the absolute value of internal energy requires knowing its value at a specific reference point, which is arbitrary. Hence, the absolute value of internal energy cannot be determined.
Reasoning:
- The reason given for the assertion is correct. Internal energy is indeed a sum of many types of energies that depend on several factors. The internal energy of a system depends on the nature, composition, and state of the system, as well as external factors such as temperature and pressure.
- The kinetic and potential energies associated with molecular motion, rotation, and vibration contribute to the internal energy. Additionally, the intermolecular forces and interactions between molecules also contribute to the internal energy.
- These factors make it impossible to determine the absolute value of internal energy, as it is dependent on various factors that may vary from system to system.
Conclusion:
Based on the explanation and reasoning above, it can be concluded that both the assertion and reason are correct, and the reason is indeed the correct explanation for the assertion.
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The internal energy of a system may be changed either by allowing the exchange of heat with the surroundings or by doing work on the system. If the reaction is carried out at a constant volume, pressure-volume work done is zero. We know that qp = qv + ngRT. Internal energy is an extensive property and a state function. The questions from (i) to (iv) consist of an assertion (A) and reason (R). Choose the correct option:Assertion: Absolute value of internal energy (U) cannot be determined.Reason: Internal energy is a sum of many types of energies, that depend on several factors.a)A and R both are correct and R is the correct explanation of A.b)A and R both are correct but R is not the correct explanation of A.c)A is true but R is false.d)A is false but R is true.Correct answer is option 'A'. Can you explain this answer?
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The internal energy of a system may be changed either by allowing the exchange of heat with the surroundings or by doing work on the system. If the reaction is carried out at a constant volume, pressure-volume work done is zero. We know that qp = qv + ngRT. Internal energy is an extensive property and a state function. The questions from (i) to (iv) consist of an assertion (A) and reason (R). Choose the correct option:Assertion: Absolute value of internal energy (U) cannot be determined.Reason: Internal energy is a sum of many types of energies, that depend on several factors.a)A and R both are correct and R is the correct explanation of A.b)A and R both are correct but R is not the correct explanation of A.c)A is true but R is false.d)A is false but R is true.Correct answer is option 'A'. Can you explain this answer? for Class 11 2024 is part of Class 11 preparation. The Question and answers have been prepared according to the Class 11 exam syllabus. Information about The internal energy of a system may be changed either by allowing the exchange of heat with the surroundings or by doing work on the system. If the reaction is carried out at a constant volume, pressure-volume work done is zero. We know that qp = qv + ngRT. Internal energy is an extensive property and a state function. The questions from (i) to (iv) consist of an assertion (A) and reason (R). Choose the correct option:Assertion: Absolute value of internal energy (U) cannot be determined.Reason: Internal energy is a sum of many types of energies, that depend on several factors.a)A and R both are correct and R is the correct explanation of A.b)A and R both are correct but R is not the correct explanation of A.c)A is true but R is false.d)A is false but R is true.Correct answer is option 'A'. Can you explain this answer? covers all topics & solutions for Class 11 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for The internal energy of a system may be changed either by allowing the exchange of heat with the surroundings or by doing work on the system. If the reaction is carried out at a constant volume, pressure-volume work done is zero. We know that qp = qv + ngRT. Internal energy is an extensive property and a state function. The questions from (i) to (iv) consist of an assertion (A) and reason (R). Choose the correct option:Assertion: Absolute value of internal energy (U) cannot be determined.Reason: Internal energy is a sum of many types of energies, that depend on several factors.a)A and R both are correct and R is the correct explanation of A.b)A and R both are correct but R is not the correct explanation of A.c)A is true but R is false.d)A is false but R is true.Correct answer is option 'A'. Can you explain this answer?.
The internal energy of a system may be changed either by allowing the exchange of heat with the surroundings or by doing work on the system. If the reaction is carried out at a constant volume, pressure-volume work done is zero. We know that qp = qv + ngRT. Internal energy is an extensive property and a state function. The questions from (i) to (iv) consist of an assertion (A) and reason (R). Choose the correct option:Assertion: Absolute value of internal energy (U) cannot be determined.Reason: Internal energy is a sum of many types of energies, that depend on several factors.a)A and R both are correct and R is the correct explanation of A.b)A and R both are correct but R is not the correct explanation of A.c)A is true but R is false.d)A is false but R is true.Correct answer is option 'A'. Can you explain this answer? for Class 11 2024 is part of Class 11 preparation. The Question and answers have been prepared according to the Class 11 exam syllabus. Information about The internal energy of a system may be changed either by allowing the exchange of heat with the surroundings or by doing work on the system. If the reaction is carried out at a constant volume, pressure-volume work done is zero. We know that qp = qv + ngRT. Internal energy is an extensive property and a state function. The questions from (i) to (iv) consist of an assertion (A) and reason (R). Choose the correct option:Assertion: Absolute value of internal energy (U) cannot be determined.Reason: Internal energy is a sum of many types of energies, that depend on several factors.a)A and R both are correct and R is the correct explanation of A.b)A and R both are correct but R is not the correct explanation of A.c)A is true but R is false.d)A is false but R is true.Correct answer is option 'A'. Can you explain this answer? covers all topics & solutions for Class 11 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for The internal energy of a system may be changed either by allowing the exchange of heat with the surroundings or by doing work on the system. If the reaction is carried out at a constant volume, pressure-volume work done is zero. We know that qp = qv + ngRT. Internal energy is an extensive property and a state function. The questions from (i) to (iv) consist of an assertion (A) and reason (R). Choose the correct option:Assertion: Absolute value of internal energy (U) cannot be determined.Reason: Internal energy is a sum of many types of energies, that depend on several factors.a)A and R both are correct and R is the correct explanation of A.b)A and R both are correct but R is not the correct explanation of A.c)A is true but R is false.d)A is false but R is true.Correct answer is option 'A'. Can you explain this answer?.
Solutions for The internal energy of a system may be changed either by allowing the exchange of heat with the surroundings or by doing work on the system. If the reaction is carried out at a constant volume, pressure-volume work done is zero. We know that qp = qv + ngRT. Internal energy is an extensive property and a state function. The questions from (i) to (iv) consist of an assertion (A) and reason (R). Choose the correct option:Assertion: Absolute value of internal energy (U) cannot be determined.Reason: Internal energy is a sum of many types of energies, that depend on several factors.a)A and R both are correct and R is the correct explanation of A.b)A and R both are correct but R is not the correct explanation of A.c)A is true but R is false.d)A is false but R is true.Correct answer is option 'A'. Can you explain this answer? in English & in Hindi are available as part of our courses for Class 11.
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