Sections 10.1 and 10.2 Properties of Gases Historical Gas Laws.

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Presentation transcript:

Sections 10.1 and 10.2 Properties of Gases Historical Gas Laws

Properties of Gases and Historical Gas Laws In these sections… a.Gas Properties and their Unites b.Pressure c.Historical Gas Laws 1.Boyle’s Law (Pressure and Volume) 2.Charles’s Las (Temperature and Volume) 3.Avogadro’s Law (Amount and Volume)

Properties of Gases What makes gases special? Gases vs. Solids and Liquids

Simulation

Properties of Gases: Units

Properties of Gases: Pressure

Properties of Gases: Measuring Pressure

Properties of Gases: Pressure Units

Properties of Gases: Converting Between Pressure Units A gas sample has a pressure of 50.4 kPa. What is this pressure in atm?

Historical Gas Laws

Historical Gas Laws: Boyle’s Law When temperature and amount are constant. Simulation

Historical Gas Laws: Boyle’s Law A sample of gas has a volume of 458 mL at a pressure of atm. The gas is compressed and now has a pressure of 3.20 atm. Predict if the new volume is greater or less than the initial volume, and calculate the new volume. Assume temperature is constant and no gas escaped from the container.

Historical Gas Laws: Charles’s Law When pressure and amount are constant. Simulation

Historical Gas Laws: Charles’s Law Why isn’t V = 0 when T = 0 o C?

Historical Gas Laws: Charles’s Law A sample of gas has a volume of 2.48 L at a temperature of 58.0 °C. The gas sample is cooled to a temperature of –5.00 °C (assume pressure and amount of gas are held constant). Predict whether the new volume is greater or less than the original volume, and calculate the new volume.

Historical Gas Laws: Avogadro’s Law When pressure and temperature are constant. Simulation

Historical Gas Laws: Avogadro’s Law KEY: Gas volume depends only on amount present, not what gas is present.

Historical Gas Laws: Avogadro’s Law A sample of gas contains 2.4 mol of SO 2 and 1.2 mol O 2 and occupies a volume of 17.9 L. The following reaction takes place: 2 SO 2 (g) + O 2 (g) → 2 SO 3 (g) Calculate the volume of the sample after the reaction takes place (assume temperature and pressure are constant). 2 SO 2 (g) + O 2 (g) → 2 SO 3 (g)