Advertisements
Advertisements
Question
Explain the following observation.
The size of a weather balloon becomes larger and larger as it ascends up to larger altitude
Advertisements
Solution
The volume of the gas is inversely proportional to the pressure at a given temperature according to Boyle’s law. As the weather balloon ascends, the pressure tends to decrease. As a result, the volume of the gas inside the balloon or the size of the balloon is likely to increase.
APPEARS IN
RELATED QUESTIONS
Give reason for the following:
Gases exert pressure in all directions.
Convert the following pressure value into Pascals.
107000 Nm−2
Hot air balloons float in the air because of the low density of the air inside the balloon. Explain this with the help of an appropriate gas law.

Identify the gas laws from the following diagram.
| Diagram | Gas laws |
![]() |
______________ |
Consider a sample of a gas in a cylinder with a movable piston.

Show diagrammatically the changes in the position of the piston, if pressure is increased from 1.0 bar to 2.0 bar at a constant temperature.
Explain the following observation.
Liquid ammonia bottle is cooled before opening the seal
A sample of gas at 15°C at 1 atm. has a volume of 2.58 dm3. When the temperature is raised to 38°C at 1 atm does the volume of the gas Increase? If so, calculate the final volume.
Hydrochloric acid is treated with a metal to produce hydrogen gas. Suppose a student carries out this reaction and collects a volume of 154.4 × 10−3 dm3 of a gas at a pressure of 742 mm of Hg at a temperature of 298 K. What mass of hydrogen gas (in mg) did the student collect?
A certain sample of gas has a volume of 0.2 L at one atmosphere pressure and 273.15 K. What is the volume of gas at 273.15°C at same pressure?
At what temperature, the volume of gas would become zero?

