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# 12.2

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• 1. Gas Laws 12.2
• 2. Variables you need to know
• P = pressure exerted by the gas
• V = volume of the gas
• T = temperature in Kelvin
• n = number of moles of gas
• (Oh yes, you will need mole island.)
• 3. Boyle’s Law
• Deals with pressure and volume .
• As pressure increases, volume decreases. The opposite is also true.
• P 1 V 1 =P 2 V 2
• See page 425 for example
• 4. Charles's Law
• Deals with temperature and volume .
• An increase in temperature will cause an increase in volume. The opposite is also true.
• V 1 /T 1 = V 2 /T 2
• See page 428 for example
• 5. Gay-Lussac’s Law
• Deals with pressure and temperature .
• Increased temperature = increased pressure. The opposite is also true.
• P 1 /T 1 = P 2 /T 2
• See page 430 for example