Practice Charles's Law in Chemistry

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

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Quick Recap

Charles's law states that for a fixed amount of gas at constant pressure, volume is directly proportional to absolute temperature.

Warmer gas spreads out more when it is free to expand.

Showing a random 20 of 50 problems.

Example 1

medium

A gas thermometer reads volume

220\text{ mL}

at the known point

275\text{ K}

. Later it reads

264\text{ mL}

at constant pressure. What temperature does this indicate?

Example 2

medium

2.40\text{ L}

argon sample at

300\text{ K}

is heated at constant pressure until it reaches

3.60\text{ L}

. Find the new kelvin temperature.

Example 3

easy

A gas sample of

120\text{ mL}

150\text{ K}

is heated to

450\text{ K}

at constant pressure. New volume?

Example 4

easy

Convert

77\,^{\circ}\text{C}

to kelvin for use in Charles's law.

Example 5

medium

1.5\text{ L}

gas at

250\text{ K}

is heated to

350\text{ K}

at constant pressure. By how many liters does it expand?

Example 6

medium

Two readings on a hot-air balloon's gas bag at constant pressure: at

290\text{ K}

the bag holds

580\text{ L}

. To make it lift more, the air is heated to

348\text{ K}

. How much larger is the volume?

Example 7

easy

A gas at

400\text{ K}

has volume

800\text{ mL}

. Cooled to

200\text{ K}

, what is its volume at constant pressure?

Example 8

medium

A neon sample occupies

620\text{ mL}

27\,^{\circ}\text{C}

. Find its volume at

327\,^{\circ}\text{C}

at constant pressure.

Example 9

easy

500\text{ mL}

gas at

300\text{ K}

is warmed to

450\text{ K}

at constant pressure. New volume?

Example 10

easy

True or false: if the pressure of a gas is not held constant, Charles's law applies directly.

Example 11

easy

A weather balloon holds

4.0\text{ L}

of helium at

200\text{ K}

. The balloon is warmed to

300\text{ K}

at constant pressure. What is its new volume?

Example 12

medium

A gas occupies

720\text{ mL}

360\text{ K}

. Find its volume when cooled to

-33\,^{\circ}\text{C}

at constant pressure.

Example 13

hard

A scientist plots gas volume against Celsius temperature at constant pressure and extends the line. The

x

-intercept is at

-273\,^{\circ}\text{C}

. Explain what this point represents physically.

Example 14

easy

A gas occupies

250\text{ mL}

100\text{ K}

. Find its volume at

400\text{ K}

at constant pressure.

Example 15

hard

1.20\text{ L}

gas sample is at

-73\,^{\circ}\text{C}

. It is heated at constant pressure until both the kelvin temperature and the volume double. What is the final Celsius temperature, and what is the final volume?

Example 16

hard

A sealed flexible bag of gas is at

310\text{ K}

with volume

620\text{ mL}

1\text{ atm}

. The pressure is increased so the bag's pressure rises 25% while temperature also rises to

372\text{ K}

. Is Charles's law sufficient to predict the new volume?

Example 17

medium

Fill in the blank: At constant pressure, if a gas's kelvin temperature rises by 50%, its volume rises by ____%.

Example 18

medium

At constant pressure, a

750\text{ mL}

gas at

375\text{ K}

is cooled to

225\text{ K}

. By how many milliliters does it shrink?

Example 19

medium

A gas at

200\text{ K}

and

0.60\text{ L}

is warmed at constant pressure until it reaches

0.90\text{ L}

. Find the new temperature in Celsius.

Example 20

medium

A gas at

320\text{ K}

fills

480\text{ mL}

. What temperature triples the original volume at constant pressure?

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Related Concepts

Gas Laws Avogadro's Law