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Gas Laws. Animations of Basic Gas Laws entialchemistry/flash/gasesv6.swf (animation with audio)

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Presentation on theme: "Gas Laws. Animations of Basic Gas Laws entialchemistry/flash/gasesv6.swf (animation with audio)"— Presentation transcript:

1 Gas Laws

2 Animations of Basic Gas Laws entialchemistry/flash/gasesv6.swf (animation with audio) entialchemistry/flash/gasesv6.swf

3 Boyles Law V 1/P (T = constant ) Pressure Volume = Constant P 1 V 1 = P 2 V 2

4 Boyles Law

5 Charless Law The volume of a gas is directly proportional to temperature, and extrapolates to zero at zero Kelvin.

6 Charles Law

7 Charless Law V T (P = constant ) V = bT (P = constant) b = proportionality constant T is always in Kelvin!!!

8 Charless Law P = constant

9 Avogadros Law For a gas at constant temperature and pressure, the volume is directly proportional to the number of moles of gas.

10 Avogadros Law V n (P and T = constant ) V = an a = proportionality constant V = volume of the gas n = number of moles of gas

11 Ideal Gas Law 4 An equation of state for a gas. 4 state is the condition of the gas at a given time. PV = nRT

12 Ideal Gas Law PV = nRT R = proportionality constant = L atm mol P = pressure in atm V = volume in liters n = moles T = temperature in Kelvins

13 PV = nRT Variables on the same side of the equation are inversely proportional Variables on opposite sides of the equation are directly proportional

14 Standard Temperature and Pressure STP P = 1 atmosphere T = C = 273K The molar volume of an ideal gas is liters at STP

15 A balloon inflated in an air- conditioned room at 27 o C, has a volume of 4 L. It is heated to a temperature of 57 o C. What is the new volume of the balloon if the pressure remains constant

16 The gas left in an used aerosol can is at a pressure of 1 atm at 27 o C. If this can is thrown unto a fire, what is the internal pressure of the gas when its temperature reaches 927 o C

17 A container with an initial volume of 1 L is occupied by a gas at a pressure of 1.5 atm at 25 o C. By changing the volume, the pressure of the gas increases to 6 atm as the temperature is raised to 100 o C. What is the new volume?

18 A gas occupies a volume of 180 mL at 35.0 o C and 740 mm Hg. What is the volume of the gas at conditions of STP?


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