Boyle's Law Hot-Air Balloon

[Audio] Boyle's Law . Hot-Air Balloon . By: Noura Mohamed Al Saud . class 12/ B.

[Audio] Who discovered Boyle's Law . Every student of general chemistry knows Robert Boyle ( 1627– 1691) as the man who discovered that as pressure increases, the volume of gases decreases, and vice versa. This is Boyle's famous law. As a leading scientist and intellectual of his time, he was a great proponent of experimental methods..

[Audio] What is Boyles Law? Boyles law states that for a given mass of a gas at a constant temperature, the volume of the gas differs inversely with pressure. Formula: P1 x V1= P2 x V2 ..

[Audio] Real Life Examples of Boyles Law . An example of Boyle's Law in action can be seen in a balloon. Air is blown into the balloon. This air pressure pushes against the rubber, inflating the balloon. When one end of the balloon is compressed to reduce its volume, the internal pressure increases and the uncompressed portion of the balloon expands..

[Audio] The hot air balloon is an examples of Boyle's law: That the size of balloon increases as pressure decreases. As we know that if the height increases, pressure decreases because there are less molecules above us..

[Audio] How will the pressure of molecules outside the balloon effect the pressure of molecule inside the balloon? We can say that : the force exerted by the molecules on stuff will cause the pressure arises from it. If the pressure inside the balloon is higher than the pressure outside ( air) Then the number of collisions per second of the molecules inside the balloon is higher than that of the ones outside..

[Audio] As we know the balloon exerted a net force on it outside. So the balloon expands heat inside until the net force becomes zero. ΣF= 0.

[Audio] When this ΣF= 0 happens? This will happen when the rate of collision outside equals that of inside. So the balloon expands until the net force becomes zero. Thus happens when the rate of collision outside equals that of inside. In this condition the pressure is equalised..

[Audio] 1- What is the formula for Boyle's Law? 2-When Pressure increases then the Volume must... 3- When Volume increases then Pressure must....

[Audio] 1- pv = k 2- If the pressure " P" increases, the volume " V" will decrease. 3- If volume increases, then pressure decreases and vice versa, when the temperature is held constant..

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[Audio] Thank you.. 69STA SRKH_'N.