12.2

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12.2

  1. 1. Gas Laws 12.2
  2. 2. Variables you need to know <ul><li>P = pressure exerted by the gas </li></ul><ul><li>V = volume of the gas </li></ul><ul><li>T = temperature in Kelvin </li></ul><ul><li>n = number of moles of gas </li></ul><ul><ul><ul><li>(Oh yes, you will need mole island.) </li></ul></ul></ul>
  3. 3. Boyle’s Law <ul><li>Deals with pressure and volume . </li></ul><ul><li>As pressure increases, volume decreases. The opposite is also true. </li></ul><ul><li>P 1 V 1 =P 2 V 2 </li></ul><ul><ul><li>See page 425 for example </li></ul></ul>
  4. 4. Charles's Law <ul><li>Deals with temperature and volume . </li></ul><ul><li>An increase in temperature will cause an increase in volume. The opposite is also true. </li></ul><ul><li>V 1 /T 1 = V 2 /T 2 </li></ul><ul><ul><li>See page 428 for example </li></ul></ul>
  5. 5. Gay-Lussac’s Law <ul><li>Deals with pressure and temperature . </li></ul><ul><li>Increased temperature = increased pressure. The opposite is also true. </li></ul><ul><li>P 1 /T 1 = P 2 /T 2 </li></ul><ul><ul><li>See page 430 for example </li></ul></ul>
  6. 6. Avogadro's Law <ul><li>Gas volume is directly proportional to the number of moles of gas at the same temperature and pressure. </li></ul><ul><ul><li>The problem is volume changes with temperature and pressure. </li></ul></ul><ul><ul><li>STP 0 0 C and 1 atmosphere </li></ul></ul><ul><li>V 1 /n 1 =V 2 /n 2 </li></ul><ul><li>You will have to use mole island to convert volume (Liters) & moles. </li></ul>

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