Pressure

Question 1

Definition of Pressure

Answer 1

Pressure is defined as the force exerted per unit area. It is a scalar quantity, meaning it has magnitude but no direction. The formula for pressure (P) is:
p = F / A
​P = pressure
F = force
A = area

Question 2

Units of Pressure

Answer 2

Pascal (Pa): The SI unit of pressure, defined as one newton per square meter (N/m²).

Atmosphere (atm): A unit based on the average atmospheric pressure at sea level, equal to 101,325 Pa.

Question 3

Types of Pressure

Answer 3

Atmospheric Pressure: The pressure exerted by the weight of the atmosphere. Standard atmospheric pressure is 101,325 Pa.

Question 4

Boyle’s Law

Answer 4

Boyle’s Law states that the pressure of a given amount of gas is inversely proportional to its volume, provided the temperature remains constant. Mathematically: P1 V1=P2 V2

Question 5

Charles’s Law

Answer 5

Charles’s Law states that the volume of a given mass of gas is directly proportional to its absolute temperature, provided the pressure remains constant. Mathematically: V1/T1=V2/T2

Question 6

Pressure Law

Answer 6

Pressure law states a fixed mass of gas at constant volume the pressure is directly proportional to its absolute temperature. Mathematically: P1/T1=P2/T2

Question 7

General Gas Law

Answer 7

he General Gas Law, also known as the Combined Gas Law, combines several individual gas laws (Boyle’s Law, Charles’s Law, and Gay-Lussac’s Law) into a single equation. Mathematically: P1 V1/T1= P2 V2/T2