Subsection 16.1. Internal energy for Physics, A Level - revisedeck

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16.1. Internal energy

A subsection of Physics, 9702, through 16. Thermodynamics

Listing 10 of 16 questions

What is the internal energy of an object?

9702_s06_qp_1

MCQ

2006

Paper 1, Variant 0

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Explain what is meant by the internal energy of a substance. State and explain, in molecular terms, whether the internal energy of the following increases, decreases or does not change. a lump of iron as it is cooled some water as it evaporates at constant temperature Use

9702_s06_qp_2

THEORY

2006

Paper 2, Variant 0

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What is the internal energy of an object?

9702_s12_qp_11

MCQ

2012

Paper 1, Variant 1

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What is the internal energy of an object?

9702_s12_qp_13

MCQ

2012

Paper 1, Variant 3

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State what is meant by the internal energy of a system. State and explain qualitatively the change, if any, in the internal energy of the following systems: a lump of ice at 0 °C melts to form liquid water at 0 °C, a cylinder containing gas at constant volume is in sunlight so that its temperature rises from 25 °C to 35 °C.

9702_s12_qp_42

THEORY

2012

Paper 4, Variant 2

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State what is meant by the internal energy of a system. By reference to intermolecular forces, explain why the change in internal energy of an ideal gas is equal to the change in total kinetic energy of its molecules. State and explain the change, if any, in the internal energy of a solid metal ball as it falls under gravity in a vacuum.

9702_s20_qp_41

THEORY

2020

Paper 4, Variant 1

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State what is meant by the internal energy of a system. By reference to intermolecular forces, explain why the change in internal energy of an ideal gas is equal to the change in total kinetic energy of its molecules. State and explain the change, if any, in the internal energy of a solid metal ball as it falls under gravity in a vacuum.

9702_s20_qp_43

THEORY

2020

Paper 4, Variant 3

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State what is meant by the internal energy of a system. With reference to molecular kinetic and potential energies, describe and explain how the internal energy of the system changes when: a gas is heated at constant volume so that its temperature increases a wire is stretched within its elastic limit at constant temperature.

9702_s24_qp_42

THEORY

2024

Paper 4, Variant 2

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A student suggests that, when an ideal gas is heated from 100 °C to 200 °C, the internal energy of the gas is doubled. State what is meant by internal energy. By reference to one of the assumptions of the kinetic theory of gases and your answer in , deduce what is meant by the internal energy of an ideal gas. State and explain whether the student’s suggestion is correct.

9702_w12_qp_41

THEORY

2012

Paper 4, Variant 1

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A student suggests that, when an ideal gas is heated from 100 °C to 200 °C, the internal energy of the gas is doubled. State what is meant by internal energy. By reference to one of the assumptions of the kinetic theory of gases and your answer in , deduce what is meant by the internal energy of an ideal gas. State and explain whether the student’s suggestion is correct.

9702_w12_qp_42

THEORY

2012

Paper 4, Variant 2

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Questions Discovered

16