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Check what I know: Thermal Properties of Matter · G3 Physics and O-Level Physics

Check what you know about thermal properties, practise what needs work, then check your progress and return for a later review.

SEC G3 Physics 2027

Learning goals

Work through the questions and use the feedback to plan revision.

Check what I know

Check what I know: Thermal Properties of Matter · G3 Physics and O-Level Physics

A text-first thermal-properties assessment with explicit masses, energies, temperatures, times and cooling-curve features.

About 8 minutes

Check what I know

Answer 9 short questions. This starting check helps choose what to work on; it does not prove mastery.

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This check needs JavaScript to record answers. The reviewed questions are listed below for study.

A model assigns 45 J to random particle motion and 30 J to interparticle position. What internal energy does the model assign?

75 J
15 J
45 J
30 J

Pure water freezes while its temperature remains constant. Which energy-transfer statement is correct?

Energy transfers from the water to the surroundings.
Energy transfers from the surroundings to the water.
No energy transfers because temperature is constant.
The transfer direction reverses every second.

Which statement correctly describes the heat capacity of an object, such as a steel saucepan?

The energy needed to raise the temperature of the whole object by 1 K.
The energy the object holds at its present temperature.
The highest temperature the object can reach before it melts.
The energy needed to raise the temperature of the object by 1 K, which is the same for every object made of steel.

How much energy raises 2.0 kg of water by 3.0 K if c = 4200 J kg⁻¹ K⁻¹?

6300 J
8400 J
2.52 × 10⁷ J
25 200 J

Which comparison between boiling and evaporation is correct?

Evaporation occurs throughout the liquid, whereas boiling occurs only at the surface.
Boiling occurs throughout a liquid at a fixed temperature; evaporation occurs at the surface over a range of temperatures.
Both processes occur only at the liquid surface.
Both processes occur throughout the liquid only at its boiling point.

A pan containing some water at 100 °C is heated until all of the water has boiled away. Which statement describes the latent heat of vaporisation absorbed by this water?

The total energy the water absorbs to change from liquid to gas, with no change in its temperature.
The energy the water absorbed while it warmed up to 100 °C.
The energy the steam gives out as it rises away from the pan.
The rise in temperature of the water as it turns into steam.

How much energy melts 0.20 kg when l = 3.3 × 10⁵ J kg⁻¹?

1.65 × 10⁶ J
6.6 × 10⁵ J
3.3 × 10⁵ J
6.6 × 10⁴ J

A pure liquid is boiling steadily at its boiling point. What happens to its particles as the liquid turns into gas?

They are pulled far apart against the attractive forces between them, so their potential energy increases.
They break up into smaller particles, which take up more space as a gas.
They move faster and faster, so the temperature of the boiling liquid keeps rising.
They expand, so each particle becomes larger and less dense.

What do the axes of a standard cooling curve show?

time vertically and temperature horizontally
energy vertically and mass horizontally
temperature on both axes
temperature on the vertical axis and time on the horizontal axis

Practise

Practise: Thermal Properties of Matter · G3 Physics and O-Level Physics

A text-first thermal-properties assessment with explicit masses, energies, temperatures, times and cooling-curve features.

About 10 minutes

Practise

Questions are selected when you start. Use the feedback to decide what to practise next; this does not prove mastery.

Recent attempts

History is stored only in this browser.

No completed attempts are saved yet.

This check needs JavaScript to record answers. The reviewed questions are listed below for study.

A particle-energy ledger assigns 28 J to random motion and 17 J to interparticle position. What internal energy does it record?

45 J
11 J
28 J
17 J

A pure liquid boils at constant temperature. What must happen during the boiling interval?

Energy transfers into the liquid while its temperature stays constant.
Energy transfers out of the liquid while its temperature rises.
No energy transfers because the temperature is constant.
The liquid freezes without any transfer.

A metal pan has a heat capacity of 800 J/K. What does this mean?

800 J must be transferred to the whole pan to raise its temperature by 1 K.
The pan holds 800 J of energy at room temperature.
The pan's temperature rises by 800 K for every joule transferred to it.
The pan can be heated by at most 800 K before it is damaged.

A 2.0 kg block gains 12 kJ and warms by 10 K. Find c.

6000 J kg⁻¹ K⁻¹
600 J kg⁻¹ K⁻¹
60 J kg⁻¹ K⁻¹
1200 J kg⁻¹ K⁻¹

Where do bubbles form during boiling?

only at the bottom of the container
only beside the heater
throughout the liquid
only at the liquid surface

A block of ice at 0 °C absorbs energy as it melts completely into water at 0 °C. The water then absorbs more energy as it warms from 0 °C to 20 °C. Which energy is the latent heat of fusion of the block?

The energy absorbed while the ice melted at 0 °C.
The energy absorbed while the water warmed from 0 °C to 20 °C.
The total of the energy absorbed in both stages.
The energy the water would give out if it cooled from 20 °C back to 0 °C.

How much energy must be supplied to boil away 0.50 kg of water at its boiling point? The specific latent heat of vaporisation of water is 2.26 × 10⁶ J/kg.

1.13 × 10⁶ J
4.52 × 10⁶ J
2.26 × 10⁶ J
1.13 × 10⁵ J

Which microscopic quantity stays constant on an ideal phase-change plateau?

total particle potential energy
particle separation
the energy transferred into or out of the substance
average particle kinetic energy

Hot water cools in a room at 25 °C and stays liquid throughout. On its cooling curve the temperature falls from 85 °C to 65 °C in the first 2 minutes, but takes 8 minutes to fall from 45 °C to 35 °C. Why is the curve less steep later?

The water is closer to room temperature, so it loses energy to the surroundings more slowly.
The water is starting to freeze, so its temperature stays almost constant.
The thermometer becomes less accurate at lower temperatures.
The water has lost all of its energy and can no longer cool.

Practise

Practise after feedback: Thermal Properties of Matter · G3 Physics and O-Level Physics

A text-first thermal-properties assessment with explicit masses, energies, temperatures, times and cooling-curve features.

About 10 minutes

Practise

Questions are selected when you start. Use the feedback to decide what to practise next; this does not prove mastery.

Recent attempts

History is stored only in this browser.

No completed attempts are saved yet.

This check needs JavaScript to record answers. The reviewed questions are listed below for study.

A particle-energy ledger assigns 28 J to random motion and 17 J to interparticle position. What internal energy does it record?

45 J
11 J
28 J
17 J

A pure liquid boils at constant temperature. What must happen during the boiling interval?

Energy transfers into the liquid while its temperature stays constant.
Energy transfers out of the liquid while its temperature rises.
No energy transfers because the temperature is constant.
The liquid freezes without any transfer.

Define the heat capacity of a body.

the energy required to raise that body's temperature by 1 K
the energy required to raise 1 kg of its material by 1 K
the energy required to change the body's state at constant temperature
the temperature rise of the body for each joule transferred

Which temperature value belongs in Q = mcΔT when a body warms from 18 °C to 43 °C?

18 K
61 K
25 K
43 K

Can evaporation occur below the boiling point?

No; particles can escape only at the boiling point.
No; evaporation is boiling that happens more slowly.
Yes, but only if bubbles form throughout the liquid.
Yes, it can occur at the liquid surface over a range of temperatures.

What is the SI unit of specific latent heat?

J kg⁻¹ K⁻¹
J K⁻¹
kg J⁻¹
J kg⁻¹

A 0.40 kg sample needs 8.0 × 10⁴ J to melt. Find l.

5.0 × 10⁵ J kg⁻¹
2.0 × 10⁵ J kg⁻¹
3.2 × 10⁴ J kg⁻¹
8.0 × 10⁴ J kg⁻¹

During condensation, why is energy released?

Particles move closer and their potential energy decreases as attractions form.
Particles speed up, so their average kinetic energy increases at constant temperature.
Particles move farther apart and their potential energy increases.
No energy is released because the temperature remains constant.

A cooling curve has two plateaus. What can they represent?

cooling of a liquid and cooling of a solid
two periods during which no energy is transferred
condensation and solidification
melting and boiling

Check my progress

Check my progress: Thermal Properties of Matter · G3 Physics and O-Level Physics

A text-first thermal-properties assessment with explicit masses, energies, temperatures, times and cooling-curve features.

About 10 minutes

Check my progress

Answer 9 questions. If accepted, this result can contribute to your course progress.

Recent attempts

History is stored only in this browser.

No completed attempts are saved yet.

Check again

Check again: Thermal Properties of Matter · G3 Physics and O-Level Physics

A text-first thermal-properties assessment with explicit masses, energies, temperatures, times and cooling-curve features.

About 10 minutes

Check again

Answer 9 questions. If accepted, this result can contribute to your course progress.

Recent attempts

History is stored only in this browser.

No completed attempts are saved yet.

Review

Review: Thermal Properties of Matter · G3 Physics and O-Level Physics

A text-first thermal-properties assessment with explicit masses, energies, temperatures, times and cooling-curve features.

About 10 minutes

Review

Answer 9 questions. A scheduled review can contribute to your course progress only when it is due and the result is accepted.

Recent attempts

History is stored only in this browser.

No completed attempts are saved yet.

Course and syllabus information

Course: SEC G3 Physics
Edition: SEC G3 Physics 2027

Check what I know: Thermal Properties of Matter · G3 Physics and O-Level Physics

Check what I know: Thermal Properties of Matter · G3 Physics and O-Level Physics

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Practise: Thermal Properties of Matter · G3 Physics and O-Level Physics

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Check my progress: Thermal Properties of Matter · G3 Physics and O-Level Physics

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Check again: Thermal Properties of Matter · G3 Physics and O-Level Physics

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