Diffusion stp and ideal gas law
This presentation is the property of its rightful owner.
Sponsored Links
1 / 12

Diffusion, STP, and Ideal Gas Law PowerPoint PPT Presentation


  • 51 Views
  • Uploaded on
  • Presentation posted in: General

Diffusion, STP, and Ideal Gas Law. 12-10-09. Diffusion. Diffusion – movement of particles from a region of higher density to a region of lower density; this is caused by the random motion of molecules. What happens if I release open a container filled with green gas?.

Download Presentation

Diffusion, STP, and Ideal Gas Law

An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

Presentation Transcript


Diffusion stp and ideal gas law

Diffusion, STP, and Ideal Gas Law

12-10-09


Diffusion

Diffusion

  • Diffusion – movement of particles

    from a region of higher density to a

    region of lower density; this is caused by the random motion of molecules

What happens if I release open a container filled with green gas?


Dalton s law of partial pressures

Dalton’s law of partial pressures

  • Dalton’s Law of Partial Pressure – the total pressure of a mixture of gases is equal to the sum of the partial pressures of the component gases

Ptotal = PA + PB + PC …

B

A

C

A

In this cylinder, which type of gas molecule will have the highest partial pressure?

A

A

B

B

B

C

A

A

B

C

Molecule A


Practice partial pressures

Practice Partial pressures

  • If the partial pressure of A is 6 atm (PA = 6), the partial pressure of B is 5 atm (PB = 5), and the partial pressure of C is 3 atm (PC = 3), what is the total pressure of the container?


Derive ideal gas law

Derive ideal gas law

  • Variables

    • Pressure

    • Temperature

    • Volume

    • Number of Molecules (Moles)

What happens to the pressure when we change these?

Increase Temperature = Increase Pressure

Increase Volume= Decrease Pressure

Increase Moles = Increase Pressure


Ideal gas law

Ideal gas law

  • Ideal Gas – gas in which molecules keep the exact same speed after collisions. In other words, friction does not slow them down

    • Can approximate most gases as ideal

  • PV = nRT

    • P = Pressure

    • V = Volume

    • n = number of moles

    • R = Ideal Gas Constant

    • T = temperature


Ideal gas constant

Ideal gas constant

  • R = Ideal Gas Constant

  • R = 8.314

  • R = 0.0821


Review celsius and kelvin

Review: celsius and kelvin

  • Celsius to Kelvin

  • TK = TC + 273

  • Kelvin to Celsius

  • Tc = TK - 273

The temperature in Kelvin is always bigger than the temperature in Celsius!!

TK > TC


Standard temperature and pressure

Standard temperature and pressure

  • Because gases are easily affected by temperature and pressure changes, we need a standard pressure and temperature to refer to

  • Standard Temperature and Pressure (STP)

    • Temperature = 0 degrees C

    • Pressure = 1 atm


Standard temperature and pressure ideal gas law

Standard Temperature and Pressure & Ideal gas law

  • Let’s use PV=nRT to find the volume of 1.00 mol of an ideal gas at STP.

    • P = 1 atm

    • V = ?

    • n = 1.00 mol

    • R = 0.0821

    • T = 0 degrees celsius + 273 Kelvin = 273 Kelvin


More ideal gas problems

More ideal gas Problems

  • What pressure has a container with 1.20 moles of gas, 14.88 L, and 25 degrees Celsius?


More ideal gas problems1

More Ideal Gas Problems

  • A balloon has a volume of 15.9 L, 149 kPa, and a temperature of 28 degrees C. How many moles of gas are in the balloon?


  • Login