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Presentation transcript:

How many people work at Disney World? 53,500!

How many moles is 49g of Ca? 49g x 1mol =1.2mol 40gCa Molar Calculation! How many moles is 49g of Ca? 49g x 1mol =1.2mol 40gCa

10g Zinc reacts with hydrochloric acid to produce zinc (II) chloride and hydrogen gas. What volume of hydrogen gas will be produced? 1 Zn + 2HCl  1ZnCl2 + 1H2 mol 0.15 X=0.15 ÷65 x22.4 g/L 10 =3.36L

Today Ideal Gas Law (PV=nRT) Temp/volume lab Practice worksheet Fun w/gases

What is an “IDEAL” gas? It assumes: Particles are SO small and SO far apart, that they basically occupy no volume No intermolecular attraction Constant random motion Elastic collisions Same as Kinetic Theory!!

What 3 things that affect gas pressure? ____________ Temperature Volume Amount of gas (moles)

Ideal Gas Law (Sum of All the Laws): PV = nRT n=#moles R = 0.0821 atm = 8.31 kPa = 62.4 mmHg

Ideal Gas Law- PV = nRT P=7667 V=75 n=moles ? R= 8.31 T= 23+273 A tank has a volume of 75L. If stored at 23°C and a pressure of 7667kPa, how many moles of gas are in the tank? P=7667 V=75 n=moles ? R= 8.31 T= 23+273 (7667)(75)=n(8.31)(296) n=234mol

Ideal Gas Law- PV= nRT What volume would be occupied by 3.125 moles of gas at a pressure of 1.50 atm and 25°C? (1.5)V=(3.125)(0.0821)(298) P= V= n= R= T=

PV=nRT A balloon is inflated with 0.25 g of hydrogen gas (H2) to a pressure of 1.25 atm. If the desired volume of the balloon is 1.5L, what must be the temp?

For 1 mole of gas at 0°C and 1 atm, how many liters of volume does this represent? PV=nRT

Ideal Gas Law 1.25g of nitrogen gas is at -24°C in a 45.5L container. What is the pressure? How many grams of propane (C3H8) are sealed in a 0.8L container at 22°C and 780 mmHg?

2 moles of O2 are initially at 1 atm, 5L, and 25°C 2 moles of O2 are initially at 1 atm, 5L, and 25°C. The gas changes its conditions to 1.5 atm, and 100°C. What is the new volume?

Fun with Gases! Coke can Implosion! On your lab paper, explain what happened

How does this work? https://www.youtube.com/watch?v=IsJA7vNz sfs

How is soda made? http://www.youtube.com/watch?v=LBo-dmMulHo