## Gas Pressure

 2.3 Gas Pressure

Explaining pressure using the kinetic theory of gases.

• Gas molecules move freely and randomly
• Gas molecules hit wall of container and change direction (elastic collision) resulting in a change in momentum
• Change of momentum per time produce force
• Force per unit area produce pressure

Factors incluencing the gas pressure

1.  Gas density
• $$\rho\;\uparrow\;P\uparrow\\ \rho\;\downarrow\;P\downarrow$$

2. Temperature
• $$T\;\uparrow\;P\uparrow\\ T\;\downarrow\;P\downarrow$$

Instruments to measure gas pressure

• Bourdon gauge
• Manometer

 Another formula for pressure $$P=\dfrac{F}{A}$$, where P = pressure, F = force , A = area.   $$P\propto\dfrac{1}{A}\rightarrow P\text{ is inversely proportional to }A$$ $$A\uparrow\;\;P\downarrow$$

## Gas Pressure

 2.3 Gas Pressure

Explaining pressure using the kinetic theory of gases.

• Gas molecules move freely and randomly
• Gas molecules hit wall of container and change direction (elastic collision) resulting in a change in momentum
• Change of momentum per time produce force
• Force per unit area produce pressure

Factors incluencing the gas pressure

1.  Gas density
• $$\rho\;\uparrow\;P\uparrow\\ \rho\;\downarrow\;P\downarrow$$

2. Temperature
• $$T\;\uparrow\;P\uparrow\\ T\;\downarrow\;P\downarrow$$

Instruments to measure gas pressure

• Bourdon gauge
• Manometer

 Another formula for pressure $$P=\dfrac{F}{A}$$, where P = pressure, F = force , A = area.   $$P\propto\dfrac{1}{A}\rightarrow P\text{ is inversely proportional to }A$$ $$A\uparrow\;\;P\downarrow$$