SCI206 Lecture Notes - Lecture 3: Ideal Gas Law, Oxygen Mask, Number Density
12 Oct 2013
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Discuss the structural differences between a solid and a liquid. Explain how the concept of pressure applies to a gas: recall that pressure = force / area, and the individual molecules in some sample of gas push against the walls of their container, and create pressure. It is because there is a sudden release of pressure from the gas molecules which were previously inside, pushing out against the fabric of the balloon. When this pressure is suddenly released, a loud sound is made: note that the pressure inside is (definitely) greater than the pressure outside because the pressure inside needs to keep the balloon stretched out. How do we apply the molecular explanation of temperature to making bombs and popcorn: both things involve the principle of heating something up so that it expands so much and so rapidly that an explosion is caused. Either the bursting of the kernel into a piece of popcorn.
