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Review Drill & Stoichiometry Test - PowerPoint PPT Presentation

Chm II Drill: Calculate the mass of (NH 4 ) 2 SO 4 in m g produced when 1.12 mL NH 3 gas reacts is excess H 2 SO 4 in the following rxn: NH 3 + H 2 SO 4  (NH 4 ) 2 SO 4. Review Drill & Stoichiometry Test. Water of Crystalization Lab Due Tomorrow. Chm II Homework. Review PP-11

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Review Drill & Stoichiometry Test

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Chm II Drill: Calculate the mass of (NH4)2SO4 in mg produced when 1.12 mL NH3 gas reacts is excess H2SO4 in the following rxn:NH3 + H2SO4 (NH4)2SO4

Water of Crystalization Lab Due Tomorrow

Chm II Homework

• Review PP-11

• Complete the worksheet attached to the Poly website.

Kinetic Theory

• All matter is made up of tiny particles

• The particles are in constant motion

• All collisions are elastic

Pressure

• Force per unit area

• Caused by collisions against a surface

• Gas measured in pressure

Units of Pressure

• kPa: kilopascal (Std Unit)

• Pascal: newton/sq. meter

• Atmosphere (Atm):

• mm Hg:

Standard Pressure

• 101.3 kPa (to be changed)

• 1.00 Atm

• 760 mm Hg or Torrs

• 30.0 inches Hg

• 1013 millibars

State the Following Laws

• Boyle’s Law

• Charles’ Law

• Gay Lussac’s Law

• Dalton’s Law

• Graham’s Law

Boyle’s Law

• The pressure & volume of a gas at constant temperature are inversely proportioned

P1V1 = P2V2 = K

Charles’ Law

• The volume and temperature of a gas at constant pressure are directly proportioned

V1V2

T1T2

= = K

Guy Lussac’s Law

• The pressure and temp. of a gas at constant volume are directly proportioned

P1P2

T1T2

= = K

Combined Gas Law

• Combination of the three formulas

P1V1P2V2

T1 T2

=

Common Sense

• A gas’s volume is directly proportioned to its number of moles

V1V2

n1n2

= = K

P1V1/n1T1 =

P2V2/n2T2 =

K

New Combination

P1V1P2V2

n1 T1 n2T2

= = K

PV = nRT

Dalton’s Law

• The total pressure = the sum of the partial pressures

PT = P1 + P2 + etc

Graham’s Law

• The velocities of particles are inversely proportioned to the square root of their masses

v1M2

v2M1

=

Calculate the new volume of 5.0 L of gas when its pressure is doubled and its temperature is tripled:

Calculate the volume of a gas at STP when it occupies 150.0 mL at 227oC under

303.9 kPa pressure:

Calculate the volume of 3.0 moles of gas at

-23oC under 83.1 kPa pressure.

Drill: Calculate the volume of a gas at STP when it occupies 80.0 mL at 273oC under 303.9 kPa pressure:

Drill: Calculate the number of moles of gas occupying 831 mL under 250 kPa at 227oC & Pass in Lab

CHM II HW

• Review PP 11

• Complete the attached worksheet

Are there any questions on previous material?

Calculate the volume of a gas at STP when it occupies 80.0 mL at 273oC under 303.9 kPa pressure:

Calculate the ratio of the velocities of He gas to HCl gas:

Calculate the mass of CO2 occupying 83.1 mL under 25 GPa at 227oC

Ideal Gas Law

PV = nRT

Related Formulas

D or r =

m

V

m/n

MW =

MW = m/n

n = m/MW

PV = nRT

PV =

mRT

MW

mRT

PV

MW =

Drill: Calculate the volume in mL of 4.0 g bromine gas at 127oC under 83.1 kPa pressure.

CHM II HW

• Review PP 11

• Complete the attached assignment & turn it in tomorrow

Are there any questions on previous material?

Discuss Lab

Calculate the density of carbon dioxide at 27oC under 83.1 kPa pressure

m

V

mRT

PV

D =

MW =

m

V

m RT

V P

D =

MW =

DRT

P

MW P

RT

MW =

D =

Drill:Calculate the volume of 4.0 moles of gas under 83.1 kPa pressure at 127oC:

Review & Collect Drill & HW

Are there any questions on previous material?

Calculate the volume of a gas at STP when it occupies 80.0 mL at 127oC under 303.9 kPa pressure:

5 Calculate the volume of 4.0 moles of gas under 83.1 kPa pressure at 127oC:

Calculate the molecular mass of 50 g of gas occupying 831mL under 250 MPa at 227oC

Calculate the mass of 831 mL of CO2 at 167oC under 150 kPa pressure:

The total pressure of a system is 120.0 kPa. The partial pressure of gas A is 112.0 kPa. Determine the pressure of gas B

The total pressure of a system is 150.0 kPa. The system contains 50 % A, 30 % B, & 20 % C. Determine the pressure of each gas.

Drill: Calculate the mass of CO2 occupying 83.1 mL under 25 MPa at 477oC

Calculate the density of carbon dioxide at 27oC under 83.1 kPa pressure

Calculate the velocity HBr when the velocity Be is 270 m/s:

Calculate the mass of CO occupying 831 kL at 227oC under 2.50 Mpa pressure.

Calculate the volume of H2 formed at 27oC under 150 kPa

when 6.8 mg NH3 decomposes making N2 & H2.