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Warm-Up <ul><li>What happens to all matter as it is heated? Why? </li></ul><ul><li>What is the one exception to this rule?...
2-7:The Gas Laws <ul><li>Objectives </li></ul><ul><ul><li>Define  pressure and gas pressure. </li></ul></ul><ul><ul><li>Id...
Gas Pressure <ul><li>Determined by the number of collisions between the particles of a gas and their container </li></ul><...
Unit of pressure <ul><li>Pascal – Pa </li></ul><ul><li>Atmosphere – atm </li></ul><ul><li>Millimeters of Mercury – mmHg </...
To analyze the behavior of a gas: <ul><li>Pressure (P) </li></ul><ul><ul><li>Related to the number of collisions </li></ul...
Boyle’s Law Keep  amount and Temperature of gas constant:  pressure increases, volume decreases pressure decreases, volume...
Charles’s Law Keep pressure and amount of gas constant: temperature increases, volume increases. Temperature decreases, vo...
Combined Gas Law If the amount and volume of a gas remains constant and the temperature increases, the pressure will incre...
Review <ul><li>What happens to pressure as temperature goes up? </li></ul><ul><ul><li>Pressure goes up. </li></ul></ul><ul...
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2-7 Gas Laws

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Transcript of "2-7 Gas Laws"

  1. 1. Warm-Up <ul><li>What happens to all matter as it is heated? Why? </li></ul><ul><li>What is the one exception to this rule? </li></ul>Matter expands as it is heated. Matter gains energy. The particles move faster. Space increases, increasing volume. Water
  2. 2. 2-7:The Gas Laws <ul><li>Objectives </li></ul><ul><ul><li>Define pressure and gas pressure. </li></ul></ul><ul><ul><li>Identify factors that affect gas pressure. </li></ul></ul><ul><ul><li>Predict changes in gas pressure due to changes in temperature, volume, and number of particles. </li></ul></ul><ul><ul><li>Explain Charles’ law, Boyle’s law, and the combined gas law. </li></ul></ul><ul><ul><li>Apply gas laws to solve problems involving gases. </li></ul></ul>
  3. 3. Gas Pressure <ul><li>Determined by the number of collisions between the particles of a gas and their container </li></ul><ul><li>Pressure </li></ul><ul><ul><li>force exerted per unit of area </li></ul></ul>
  4. 4. Unit of pressure <ul><li>Pascal – Pa </li></ul><ul><li>Atmosphere – atm </li></ul><ul><li>Millimeters of Mercury – mmHg </li></ul><ul><li>Standard Pressure </li></ul><ul><ul><li>760 mmHg </li></ul></ul><ul><ul><li>1 atm </li></ul></ul><ul><ul><li>101,000 Pa </li></ul></ul><ul><ul><li>101 kPa </li></ul></ul>
  5. 5. To analyze the behavior of a gas: <ul><li>Pressure (P) </li></ul><ul><ul><li>Related to the number of collisions </li></ul></ul><ul><ul><li>Measured in Pascals (Pa) </li></ul></ul><ul><li>Temperature (T) </li></ul><ul><ul><li>Related to the speed of the particles </li></ul></ul><ul><ul><li>Measured in Kelvin (K) </li></ul></ul><ul><li>Volume (V) </li></ul><ul><ul><li>The amount of space a gas occupies </li></ul></ul><ul><ul><li>Measured in Liter (L) </li></ul></ul><ul><li>Mass (M) </li></ul><ul><ul><li>Number of gas particles </li></ul></ul><ul><ul><li>(Usually expressed in moles of gas) </li></ul></ul>
  6. 6. Boyle’s Law Keep amount and Temperature of gas constant: pressure increases, volume decreases pressure decreases, volume increases
  7. 7. Charles’s Law Keep pressure and amount of gas constant: temperature increases, volume increases. Temperature decreases, volume decreases.
  8. 8. Combined Gas Law If the amount and volume of a gas remains constant and the temperature increases, the pressure will increase. If T increases then P increases.
  9. 9. Review <ul><li>What happens to pressure as temperature goes up? </li></ul><ul><ul><li>Pressure goes up. </li></ul></ul><ul><li>What happens to volume as pressure goes up? </li></ul><ul><ul><li>Volume goes down. </li></ul></ul><ul><li>What causes pressure? </li></ul><ul><ul><li>The collision between the container and the gas inside. </li></ul></ul>
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