Questions
Write a brief answer to the following questions. If you think it is necessary, you may use illustrations to support your answer.
Question 1
Explain Charles' law with its equation?
Question 2
Is Charles' law universally true? If not, what are its limitations?
Question 3
Give some real-life examples of Charles' law?
Question 4
Explain graphs of Charles' law?
Question 5
Can Charles' law be experimentally proven? If yes, write in a few words how would you?
Question 6
The volume of a fixed amount of gas is double under constant pressure. What happens to the temperature of the gas?
Question 7
How Charles' law and absolute zero are related?
Problems
Solve the following problems.
Problem 1
Hydrogen gas contracts at constant pressure from 1.00 L to 0.95 L. The initial temperature is 20 °C. Find the final temperature of the gas?
Problem 2
Carbon dioxide gas expands from 10.0 cm3 to 11.5 cm3. The final temperature is 45 °C. Determine the initial temperature if the expansion is isobaric?
Problem 3
The temperature of a gas changes from 25 °C to 80 °C. The final volume is 100 mL. Find the initial volume?
Problem 4
During transport of steam from one industrial vessel to another, temperature drops by 5 °C. The initial temperature is 120 °C. Assume the pressure remains constant. Find the final volume if the initial volume is 4.0 m3?
Problem 5
The volume of oxygen gas at 25 °C is 10 m3. If the volume of the gas is double, what will be its new temperature?
Problem 6
The volume of a balloon of helium is 0.75 L in Los Angles. The temperature in Log Angles is 13 °C. Find the volume of the balloon in Death Valley where the temperature is 51 °C? The pressure is constant at both places.
Problem 7
A gas occupies 22.2 mL at a temperature of 358 K. Find the new volume if the temperature is reduced to 220 K?
Problem 8
A student collects an experimental gas of a volume of 730 mL at 84 °C. What will be the temperature at 700 mL if the pressure is constant?
Problem 9
A sealed syringe dipped in icy water at a temperature of −12 °C. The volume of the air in the syringe at room temperature (20 °C) is 53 mL. What is the volume in the icy water?
Problem 10
An experiment is performed on a gas under constant pressure to studies its behaviour. The volume-temperature data for a fixed amount of the gas is recorded. The data is as follows:
Volume vs temperature experimental data20.0 | 21.6 | 23.1 | 24.6 | 25.4 | 26.8 |
−10 | 12 | 31 | 51 | 63 | 78 |
Find whether the gas obeys Charles' law by plotting the graph of volume vs temperature? If yes, determine absolute zero?
Problem 11
Find the missing quantity from the following data.
- V1 = 2.6 L, T1 = 12 °C, V2 = 5.5 L, T2 = ?
- V1 = 750 mm3, T1 = 55 °C, V2 = ?, T2 = 21 °C
- V1 = 0.74 m3, T1 = ?, V2 = 0.15 m3, T2 = 303.0 K
- V1 = ?, T1 = 423 K, V2 = 170 dm3, T2 = 213 K
Answers to questions
- Follow the link.
- Check the limitations section of the article link.
- Follow the link.
- Follow the link.
- Follow the link.
- When the volume of a gas is double, the absolute temperature also gets double as per Charles' law.
- Follow the link.
Answers to problems
- Ans: 5 °C
- Ans: 3.5 °C
- Ans: 84.4 mL
- Ans: 3.9 L
- Ans: 323 °C
- Ans: 0.85 mL
- Ans: 13.6 mL
- Ans: 69.3 °C
- Ans: 47 mL
- The graph of volume vs temperature is a straight line with a positive slope as expected. Hence, the gas obeys Charles' law.The graph is a straight line passing through the origin.The absolute zero temperature from the below graph is −271°C. It deviates from the actual value by 2.15 °C.The graph is a straight line passing making x-intercept at T = −271 °C.
- Ans: 330 °C
- Ans: 672 mm3
- Ans: 1495 K
- Ans: 338 dm3
Associated articles
- Charles' law
- The equation of Charles' law
- Graphs of Charles' law
- Real-life examples of Charles' law
- Charles' law and absolute zero
- To verify Charles' law experimentally
- To verify Charles' law by syringe experiment
- Charles' law calculator