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Overview         (For age - group : 11 - 16 )

Fully animated 'Escaping of air from balloon' shows how molecular diffusion takes place, what appears as a solid object is in fact not so, especially if we zoom in to molecular level. The deflating of a balloon over a period of time is a result of this effect.

Product - Animation
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Size (KB) 1334 US$    0.75 Rs. 49.50
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Time (hr:min:sec) 0:12:0
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Watch a free preview of this science  and technology animation
                                                                    

This animation has audio.This animation contains sound
Category : Diffusion
Type : Animation with sound
Animation Type : Regular

Total animation length
: 12 minute


The animation has the following sections:

  • Balloon and its structure
  • Air Escaping out of balloon
  • Common Questions
    • Myth: The pressure inside a bigger balloon is higher
    • Science Project 1: Interconnecting two balloons
    • Why it is difficult to start blowing a balloon?
    • Why do balloons filled with helium deflate faster?
    • Can a balloon inflate when kept for some days?
    • Science Project 2 - Balloon inflates when kept in air
    • Myth: Balloon will deflate faster in a cold room

  • Snapshots         
    Diffusion-Escaping of air from balloon
    Polymer chains play a big role in diffusion of air or helium out of a balloon.

    Diffusion - questions and answers on balloon

    These are questions that are answered in detailed, there are some science projects pertaining to diffusion, common myths about balloon and questions on inflation and deflation of a balloon.
    Details of the animation/ movie /software

    It is difficult to realize that the escaping of air from balloon is a function of diffusion, diffusion normally occurs through porous membranes but a balloon looks solid, how is it possible for diffusion to occur. A balloon is however made up of polymer chains. These chains have spaces between them to make them porous.

    • Balloon and its structure
    • Air Escaping out of balloon
    • Common Questions
      • Myth: The pressure inside a bigger balloon is higher
      • Science Project 1 : Interconnecting two balloons
      • Why it is difficult to start blowing a balloon?
      • Why do balloons filled with helium deflate faster?
      • Can a balloon inflate when kept for some days?
      • Science Project 2 - Balloon inflates when kept in air
      • Myth: Balloon will deflate faster in a cold room

    The animation explains the process in a clear and lucid manner; it is very easy for the students to understand the process through the animation.

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    Buyers Feedback:

    Q & A
    Q1: in ur ans 2 my 1st questn, u said internal excessive pressr is responsible for diffusion. but while describing SF6 u r using grahams law of effusion. can u plz mention an equation describing diffusion rate in terms of both mole wt. & pressr differns sunil 7/5/2008
    Ans:
       
    Q2: if we fill balloon with ordinary air it deflates no matter slowly,but,both outer & inner air have same mole. wt. so diffusion rate thru both d sides across wall shoud be same hence no net deflation should occure.does excess int pres ply any role? sunil 21/4/2008
    Ans: Firstly the molecules in a balloon are under higher pressure and their concentration is higher (packed more closely together) hence the diffusion from inside to outside takes place, but by the very nature of diffusion outside to inside also takes place, but at a much slower rate hence the balloon deflates, if you were to fill the balloon with SF6 it would actually inflate.
       


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