Question

Pressure exerted by a gas is equal to
(A) force exerted per unit time
(B) force exerted per unit area of walls of container
(C) area of walls of container per unit of force
(D) none of the above

Answer 1

Hint: Pressure exerted by gas on the balloon, expands the balloon, resulting in increasing its volume when air is blown into the balloon. This is due to the pressure exerted by the air on the boundaries of the balloon.


Complete step by step answer: Pressure is defined as the physical force exerted on an object. The force applied is perpendicular to the surface of objects per unit area. The SI unit is pascals (Pa).
The pressure exerted by a gas is equal to force on the walls of the container per unit area of walls of the container. It can be written as: $P=\dfrac{F}{A}$
Here, P= pressure exerted by a gas on the walls of the container,
A = Area of the walls of the container,
F = Force on the walls of the container
However, as given in option A, Force per unit time is Power, with SI unit Joule per second.
And Option C, is wrong, as there is no formula with area per unit of force.


Hence, option B is the correct answer.


Note: Boyle’s law, also referred to as the Boyle-Mariotte law, is an experimental gas law that describes how the pressure of a gas tends to increase as the volume of the container decreases. The total pressure of the mixture of gases can be defined as the sum of the partial pressures of each individual gas.