Temperature And Gas Behavior Quiz

1. The SI unit of temperature is:

Degree celsius (°C)

Degree fahrenheit (°F)

Kelvin (K)

Joule (J)

Concept: SI unit. Kelvin is the SI base unit for temperature. It is used widely in physics because it starts at absolute zero.

Explanation

Concept: SI unit. Kelvin is the SI base unit for temperature. It is used widely in physics because it starts at absolute zero.

2. The kelvin scale has the same size 'degree steps' as the celsius scale.

True

False

Concept: Celsius vs Kelvin spacing. A change of 1°C equals a change of 1 K. The difference is the zero point, not the step size.

Explanation

Concept: Celsius vs Kelvin spacing. A change of 1°C equals a change of 1 K. The difference is the zero point, not the step size.

3. The relationship between kelvin and celsius is (K = °C + ______).

Concept: Kelvin offset. Kelvin is shifted upward from Celsius by about 273.15. This places absolute zero at 0 K.

Explanation

Concept: Kelvin offset. Kelvin is shifted upward from Celsius by about 273.15. This places absolute zero at 0 K.

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4. 0°C is approximately equal to:

0 K

100 K

273 K

373 K

Concept: Celsius to Kelvin. Add about 273 to convert °C to K. So 0°C ≈ 273 K.

Explanation

Concept: Celsius to Kelvin. Add about 273 to convert °C to K. So 0°C ≈ 273 K.

5. Absolute zero is 0 K and is the lowest possible temperature in classical thermodynamics.

True

False

Concept: Absolute zero meaning. Absolute zero corresponds to the minimum possible thermal energy state in the classical picture. It is −273.15°C on the Celsius scale.

Explanation

Concept: Absolute zero meaning. Absolute zero corresponds to the minimum possible thermal energy state in the classical picture. It is −273.15°C on the Celsius scale.

6. Which Celsius temperature is closest to absolute zero?

0°C

−100°C

−273°C

−10°C

Concept: Absolute zero in Celsius. Absolute zero is −273.15°C. The closest option is −273°C.

Explanation

Concept: Absolute zero in Celsius. Absolute zero is −273.15°C. The closest option is −273°C.

7. Kelvin temperatures are never negative in normal physics use.

True

False

Concept: Kelvin scale non-negativity. The Kelvin scale starts at absolute zero. Negative Kelvin is not used in basic thermodynamics.

Explanation

Concept: Kelvin scale non-negativity. The Kelvin scale starts at absolute zero. Negative Kelvin is not used in basic thermodynamics.

8. The freezing point of water at standard pressure is:

100°C

0°C

−273°C

273°C

Concept: Calibration point. Water freezes at 0°C under standard atmospheric pressure. This is a key reference point for the Celsius scale.

Explanation

Concept: Calibration point. Water freezes at 0°C under standard atmospheric pressure. This is a key reference point for the Celsius scale.

9. The boiling point of water at standard pressure is:

0°C

50°C

100°C

273°C

Concept: Calibration point. Water boils at 100°C at 1 atm. Changing pressure can shift the boiling point.

Explanation

Concept: Calibration point. Water boils at 100°C at 1 atm. Changing pressure can shift the boiling point.

10. 100°C corresponds to about 373 K.

True

False

Concept: Converting boiling point. Add 273 to 100°C to get about 373 K. This matches the boiling point in Kelvin.

Explanation

Concept: Converting boiling point. Add 273 to 100°C to get about 373 K. This matches the boiling point in Kelvin.

11. A temperature difference of 20°C is the same as a difference of ______ K.

Concept: Equal step sizes. Celsius and Kelvin increments are the same size. So temperature differences convert without adding 273.

Explanation

Concept: Equal step sizes. Celsius and Kelvin increments are the same size. So temperature differences convert without adding 273.

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12. Fahrenheit is most commonly used for everyday temperature in:

The entire world

The United States (mostly)

Only Antarctica

Only laboratories

Concept: Common usage. Fahrenheit is mainly used in the U.S. for weather and daily life. Most science uses Celsius and Kelvin.

Explanation

Concept: Common usage. Fahrenheit is mainly used in the U.S. for weather and daily life. Most science uses Celsius and Kelvin.

13. A quick conversion formula is (°F = (9/5)°C + 32).

True

False

Concept: Fahrenheit conversion. Fahrenheit has a different zero and different scale spacing than Celsius. This linear formula converts between them.

Explanation

Concept: Fahrenheit conversion. Fahrenheit has a different zero and different scale spacing than Celsius. This linear formula converts between them.

14. 0°C is equal to:

0°F

100°F

32°F

−32°F

Concept: Freezing point in Fahrenheit. Water freezes at 32°F. This matches the Fahrenheit calibration.

Explanation

Concept: Freezing point in Fahrenheit. Water freezes at 32°F. This matches the Fahrenheit calibration.

15. 20°C is closest to:

20°F

32°F

68°F

100°F

Concept: Approximate conversion. Using (°F ≈ 1.8(20)+32 = 68). This is typical room temperature in Fahrenheit.

Explanation

Concept: Approximate conversion. Using (°F ≈ 1.8(20)+32 = 68). This is typical room temperature in Fahrenheit.

16. Converting a Celsius temperature to Kelvin changes the numerical value but not how 'hot' the object is.

True

False

Concept: Different scales, same physical state. Temperature scales are different ways to label the same thermal state. Only the number changes, not the physical temperature.

Explanation

Concept: Different scales, same physical state. Temperature scales are different ways to label the same thermal state. Only the number changes, not the physical temperature.

17. The symbol 'K' stands for kelvin and does ______ use a degree symbol.

Concept: Kelvin notation. Kelvin is written as K, not °K. This reflects it being an SI base unit.

Explanation

Concept: Kelvin notation. Kelvin is written as K, not °K. This reflects it being an SI base unit.

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18. If the temperature in Kelvin doubles, the temperature in Celsius also doubles.

True

False

Concept: Offset breaks 'doubling.' Celsius has an offset of 273, so doubling K does not correspond to doubling °C. Only differences match directly, not ratios.

Explanation

Concept: Offset breaks 'doubling.' Celsius has an offset of 273, so doubling K does not correspond to doubling °C. Only differences match directly, not ratios.

19. Which statement is most accurate?

Kelvin is just Celsius with different units

Kelvin is an absolute temperature scale with zero at absolute zero

Celsius cannot be used in science

Fahrenheit is the SI unit

Concept: Absolute scale. Kelvin starts at the physically meaningful zero of thermal motion in the classical sense. This makes it ideal for many physics equations.

Explanation

Concept: Absolute scale. Kelvin starts at the physically meaningful zero of thermal motion in the classical sense. This makes it ideal for many physics equations.

20. The best overall summary is:

All temperature scales share the same zero point

Celsius and Kelvin have equal step size, but Kelvin is shifted so 0 K is absolute zero

Fahrenheit is the only scientific scale

Kelvin temperatures are usually negative

Concept: Scale relationships. The key facts are the shared step size (°C ↔ K) and the 273-ish offset. Fahrenheit is a different linear scale with a different offset and step size.

Explanation

Concept: Scale relationships. The key facts are the shared step size (°C ↔ K) and the 273-ish offset. Fahrenheit is a different linear scale with a different offset and step size.