Chemistry

Finish 3 and 4 for homework.

Combined Gas Law

PV = nRT

Pressure x 22.4L = 1 mol x R x 273K

R: THE IDEAL GAS LAW CONSTANTS

R: atm

.0821 atm/L

          Mol/k

R: KPa

8.312 kpa/L

          mol/K

R: TORR

62. 36 torr/L

           mol/K

R: mmHG

62.36 mmHG/L

          mol/K

R:  psi

1.206 psi/L

          mol/K

R: mbar

83.11 mbar/L

    mol/K

R: bar

.0831bBar/L

          mol/K

R: in Hg

2.455 in Hg/L

          mol/K

R: Pa

8312 Pa/L

         mol/K

IDEAL GAS LAW: PV = nRT

1.     What dos the ideal gas law describe?

2.     What are ideal gases?

A gas that follows

It is an extension of the combined gas law. It deals with pressure, volume, temperature, and the amount of the gas.

3.     From the combined gas law to the ideal gas law, how are they different?

The ideal gas law deals with the amounts of a gas, a measured amount, a combined gas law does not deal with amounts of a gas.

COMBINED GAS LAW

P₁V₁ = P₂V₂

  T₁         T₂

IDEAL GAS LAW

PV = nRT

The Gas Law Constant: Compares that same volume (amount of gas) to standard temperature

4.     How can we change the constant of pressure, volume, and temperature in the combined gas law?

5.     What is the equation for the ideal gas law? What does each part represent?

IDEAL GAS LAW

PV = nRT

Pressure x 22.4L = 1 mol x R x 273K

P: Pressure

V: Volume

n: Number of moles

R: The Ideal Gas Law Constant

T: Temperature

6.     What is the ideal gas law constant? How is it represented (what’s its symbol)? What is the constant if pressure is measured in atmospheres? KPa? mmHg?

7.     Practice Problems # 276, 27, 28, Page 455