Practice Temperature in Physics

Use these practice problems to test your method after reviewing the concept explanation and worked examples.

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Quick Recap

A measure of the average kinetic energy of the particles in a substance, determining how hot or cold it is.

How 'hot' or 'cold' something is—how fast its molecules are moving on average.

Showing a random 20 of 50 problems.

Example 1

easy
A gas at 200 K is heated to 400 K. By what factor does the average particle KE increase?

Example 2

easy
Which scale measures the average kinetic energy of particles starting from 00 at absolute zero?

Example 3

medium
A gas in a rigid container at 300 K300 \text{ K} and 1 atm1 \text{ atm} is heated until pressure doubles. Assuming ideal gas (V constant), find the new temperature.

Example 4

hard
A sample's average particle speed doubles. By what factor does the absolute temperature change? Recall KE∝v2∝T\text{KE} \propto v^2 \propto T.

Example 5

medium
A thermometer reads 98.6°F. Convert to Celsius. (TC=59(TF−32)T_C = \frac{5}{9}(T_F - 32))

Example 6

medium
Why is it scientifically meaningless to say 40°C40°\text{C} is 'twice as hot' as 20°C20°\text{C}?

Example 7

easy
Absolute zero is the temperature at which particle motion is at its minimum. State its value in Celsius.

Example 8

medium
Convert -40°C to kelvin and to Fahrenheit. (TF=95TC+32T_F = \frac{9}{5}T_C + 32)

Example 9

challenge
Two equal masses of the same gas, A at 300 K and B at 600 K, are mixed in an insulated container. Find the final temperature.

Example 10

easy
Express 32°F32°\text{F} in Celsius. Use TC=59(TF−32)T_C = \tfrac{5}{9}(T_F - 32).

Example 11

medium
Convert 350 K to Celsius and to Fahrenheit. (TF=95TC+32T_F = \frac{9}{5}T_C + 32)

Example 12

easy
Which is colder: 250 K or -10°C?

Example 13

easy
Convert 25°C to kelvin.

Example 14

medium
A gas at 300 K300 \text{ K} has its absolute temperature increased by a factor of 1.51.5. Find the new temperature in °C°\text{C}.

Example 15

easy
Is a temperature change of 20°C the same as a change of 20 K?

Example 16

challenge
If a gas at -23°C is heated until its average particle KE quadruples, find the final Celsius temperature.

Example 17

medium
Two equal masses of the same gas at 200 K200 \text{ K} and 500 K500 \text{ K} are mixed in an insulated container. Find the final temperature.

Example 18

hard
At what kelvin temperature is the Celsius reading numerically half of the kelvin reading?

Example 19

easy
Two objects at the same temperature are in contact. What is the net heat flow between them?

Example 20

medium
Liquid helium boils at 4.2 K4.2 \text{ K}. Convert to Celsius.
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