Debate in the class—'Gases can spread and fill all the available space'. Is this property of gases beneficial or harmful?
Gases spread to fill all available space because gas particles have negligible interparticle attractions and move freely in all directions. This property has both beneficial applications and harmful consequences.
Beneficial aspects include the way perfumes and fragrances spread throughout a room, allowing us to enjoy pleasant scents. Oxygen in air spreads and becomes available for breathing everywhere.
Cooking gas spreads to reach burners evenly, and air fresheners and disinfectant sprays can cover large areas due to this property.
Harmful aspects include the spread of poisonous gases and fumes, which can cause harm to people in enclosed spaces. Disease-causing airborne particles can spread infections.
Gas leaks can fill entire buildings with dangerous or explosive gases. Pollutants and smoke spread through the atmosphere causing air pollution.
Explanation
The chapter explains through Activity 7.5 and 7.9 that gases spread to fill all available space because particles have negligible interparticle attractions and move freely in all directions. This property has both beneficial applications (fragrances, oxygen availability) and harmful consequences (spread of pollutants, toxic gases).
Solution Steps
Gases spread to fill all available space because particles have negligible interparticle attractions and move freely in all directions
Beneficial aspects: perfumes spread for pleasant scents, oxygen becomes available for breathing everywhere, cooking gas reaches burners evenly, air fresheners and disinfectant sprays cover large areas
Harmful aspects: poisonous gases harm people in enclosed spaces, airborne particles spread infections, gas leaks create explosion hazards, pollutants and smoke cause air pollution