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# Chem Mod 12

### Apologia Chemistry Module 12

Pressure The force per unit area exerted on an object.
Pressure formula P = F/A P = pressure F = force A = area
Pascal (Pa) Newtons/m²
1.000 atm 101.3 kPa 760.0 mmHg 760.0 torr
Boyle's Law PV = constant P₁V₁ = P₂V₂
Charles's Law V/T = constant V₁/T₁ = V₂/T₂
Extrapolation Following an established trend in the data even though there is no data available for that region
Combined Gas Law P₁V₁/T₁ = P₂V₂/T₂ MUST use the Kelvin temperature scale
Ideal gas property 1
Ideal gas property 2
Ideal gas property 3
Standard Temperature and Pressure (STP) Temperature = 273 K Pressure = 1.00 atm
Dalton's Law of Partial Pressure When two or more ideal gases are mixed together, the total pressure of the mixture is equal to the sum of the pressures of each individual gas. P(T) = P₁ + P₂ + P₃ + ...
The pressure of an ideal gas depends on ... the quantity of that gas
Vapor Pressure The pressure exerted by the vapor which sits on top of any liquid
The vapor pressure of any liquid (increases, decreases) with increasing temperature increases
Boiling point The temperature at which the vapor pressure of a liquid is equal to normal atmospheric pressure
Mole fraction X =
Dalton's Law with mole fractions P₁ = X₁P(T)
Ideal Gas Law PV = nRT R = 0.821 L*atm/mole*K n =
Created by: thomas.macri