Question

A student finds that as he blows air into a balloon, it becomes bigger. What inference can he make from the above?
A)Air is a gas
B)Air has mass
C)Air is matter
D)Air occupies space

Answer 1

To answer this question, you should recall the concept of properties of a gas. We know that air is gas and gas is the state of matter that has no fixed shape and no fixed volume. There is a large amount of space between particles, which have a lot of kinetic energy.

Complete Step by step solution:
Blowing up a balloon requires forcing additional air particles from our lungs into the balloon. The gaseous particles collide with each other as well as the walls of the balloon creating enough air pressure to force the rubber of the balloon to expand and the balloon to inflate. Due to force exerted on the wall by the gaseous particles, the material of the balloon stretches and leads to increase in the size of the balloon the collision of these air particles with the walls generates a high-pressure environment inside the balloon relevant to the atmospheric pressure around it. This explains that when a balloon is released, the high-pressure air flows out of the balloon to the low-pressure air surrounding it.
Therefore, we can conclude that the correct answer to this question is option D.

Note: Usually we measure the pressure of the gas, but gases have other measurable properties: temperature, volume and number of particles, which is expressed in a mole number. For measuring temperature, the Kelvin scale is often used. We know that the temperature and pressure vary from place to place, scientists use a standard reference point, called standard temperature and pressure (STP), in calculations and equations. Standard temperature is defined as the freezing point of water $32{\text{ degrees Fahrenheit }}\left( {{0^{\text{o}}}C,{\text{ }}or{\text{ }}273.15{\text{ }}K} \right)$. Standard pressure is defined as one atmosphere which is the pressure exerted by the atmosphere on Earth at sea level.