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NEET Exam  >  NEET Tests  >  Test: Measurement of ∆U and ∆H: Calorimetry (June 13) - NEET MCQ

Test: Measurement of ∆U and ∆H: Calorimetry (June 13) - NEET MCQ


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10 Questions MCQ Test - Test: Measurement of ∆U and ∆H: Calorimetry (June 13)

Test: Measurement of ∆U and ∆H: Calorimetry (June 13) for NEET 2024 is part of NEET preparation. The Test: Measurement of ∆U and ∆H: Calorimetry (June 13) questions and answers have been prepared according to the NEET exam syllabus.The Test: Measurement of ∆U and ∆H: Calorimetry (June 13) MCQs are made for NEET 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Measurement of ∆U and ∆H: Calorimetry (June 13) below.
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Test: Measurement of ∆U and ∆H: Calorimetry (June 13) - Question 1
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In calorimetry, what is the primary purpose of using a bomb calorimeter?

Detailed Solution for Test: Measurement of ∆U and ∆H: Calorimetry (June 13) - Question 1

A bomb calorimeter is primarily used to measure changes in internal energy (ΔU) at constant volume. It is a device designed to carry out combustion reactions in a sealed container, allowing the measurement of heat changes at constant volume.

Test: Measurement of ∆U and ∆H: Calorimetry (June 13) - Question 2
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What is the purpose of a coffee cup calorimeter in calorimetry?

Detailed Solution for Test: Measurement of ∆U and ∆H: Calorimetry (June 13) - Question 2

A coffee cup calorimeter is used to measure changes in enthalpy (ΔH) at constant pressure. It is designed to prevent the transfer of heat generated during the reaction to the environment.

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Test: Measurement of ∆U and ∆H: Calorimetry (June 13) - Question 3
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Which of the following statements about enthalpy is correct?

Detailed Solution for Test: Measurement of ∆U and ∆H: Calorimetry (June 13) - Question 3
Enthalpy (H) is the sum of internal energy (U) and the work done on the system at constant pressure. It is represented by the equation: H = U + PV, where P is pressure and V is volume.
Test: Measurement of ∆U and ∆H: Calorimetry (June 13) - Question 4
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What is the primary factor contributing to the change in internal energy (ΔU) in a chemical reaction?
Detailed Solution for Test: Measurement of ∆U and ∆H: Calorimetry (June 13) - Question 4

The primary factor contributing to the change in internal energy (ΔU) in a chemical reaction is the transfer of heat (q) during the reaction. ΔU = q + w, where q represents heat transfer.

Test: Measurement of ∆U and ∆H: Calorimetry (June 13) - Question 5
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What is the change in enthalpy (ΔH) for the combustion of ethylene (C2H4) at 300K, given that the change in internal energy (ΔU) is -1406 kJ for the same reaction?
Detailed Solution for Test: Measurement of ∆U and ∆H: Calorimetry (June 13) - Question 5

ΔH = ΔU + ΔngRT, where Δng is the change in the number of moles of gas. In this case, Δng = 2 - 4 = -2. Therefore, ΔH = -1406 + ((-2) x 8.314 × 10-3 x 300) = -1410.9 kJ.

Test: Measurement of ∆U and ∆H: Calorimetry (June 13) - Question 6
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Which type of calorimeter is suitable for reactions that do not significantly change the volume and absorb or evolve heat at constant pressure?
Detailed Solution for Test: Measurement of ∆U and ∆H: Calorimetry (June 13) - Question 6
A coffee cup calorimeter is suitable for reactions that do not significantly change the volume and absorb or evolve heat at constant pressure. It is designed to prevent the transfer of heat to the environment.
Test: Measurement of ∆U and ∆H: Calorimetry (June 13) - Question 7
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What is the primary purpose of the bomb in a bomb calorimeter?
Detailed Solution for Test: Measurement of ∆U and ∆H: Calorimetry (June 13) - Question 7

The primary purpose of the bomb in a bomb calorimeter is to initiate the combustion process. It contains the sample to be combusted and is pressurized with oxygen to start the reaction.

Test: Measurement of ∆U and ∆H: Calorimetry (June 13) - Question 8
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Which equation represents the change in internal energy (ΔU) in a chemical reaction involving heat transfer and work done?
Detailed Solution for Test: Measurement of ∆U and ∆H: Calorimetry (June 13) - Question 8

The change in internal energy (ΔU) in a chemical reaction involving heat transfer (q) and work done (w) is represented by the equation ΔU = q + w.

Test: Measurement of ∆U and ∆H: Calorimetry (June 13) - Question 9
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What is the unit of energy used to measure enthalpy and internal energy?
Detailed Solution for Test: Measurement of ∆U and ∆H: Calorimetry (June 13) - Question 9
The unit of energy used to measure enthalpy and internal energy is Joules.
Test: Measurement of ∆U and ∆H: Calorimetry (June 13) - Question 10
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According to Hess's Law, the enthalpy change of a chemical reaction is independent of:
Detailed Solution for Test: Measurement of ∆U and ∆H: Calorimetry (June 13) - Question 10
According to Hess's Law, the enthalpy change of a chemical reaction is independent of the path the reaction takes. It depends only on the initial and final stages of the reaction and is a state function.
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