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Sparks CH301 Gas Laws Day 4 Important Information LM 07 & 08 - - PowerPoint PPT Presentation
Sparks CH301 Gas Laws Day 4 Important Information LM 07 & 08 - - PowerPoint PPT Presentation
Sparks CH301 Gas Laws Day 4 Important Information LM 07 & 08 and HW 3 DUE WED 8:45 AM HW2 & LM06 WERE DUE THIS MORNING 8:45 AM QUIZ QUESTION: INDIVIDUAL WORK, POINTS FOR CORRECT ANSWER Which has a higher molar volume, an ideal
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Which has a higher molar volume, an ideal gas
- r liquid water, which has a density of 1 g/ml?
A) Ideal gas B) Liquid water
QUIZ QUESTION: INDIVIDUAL WORK, POINTS FOR CORRECT ANSWER
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Which has a greater density? A) Ideal gas B) Liquid water
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What are we going to learn today?
- Expand our use of the ideal gas equation
beyond just plugging in numbers.
– Determine densities – Determine molar masses – Use in stoichiometry
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USEFULLNESS? PV = nRT
- Given 3 properties of the state, calculate the 4th.
- Predicts what about the number density (moles per volume) of gases
at same P and T?
- What can you say about the molar volume (volume per one mole) of
different gases at same P and T?
- What can you say about the mass densities of different gases at same
P and T?
- Given P, T and molar mass – calculate mass density of a gas.
- Given P, T and density – calculate the molar mass of a gas.
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Which balloon has the higher number density? (Same P, T)
- A. Ar
- B. He
- C. they are the same
Polling Question: Group work
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Which balloon has the higher mass density? (Same P, T)
- A. Ar
- B. He
- C. they are the same
Polling Question: Group work
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We have two identical containers held at the same T, one contains Ar, one contains He. The containers have the same mass density. Which has the higher pressure?
- A. Ar
- B. He
- C. they are the same
Polling Question: Group work
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The oil produced from eucalyptus leaves contains the volatile organic compound
- eucalyptol. At 190 ºC and 60.0 Torr, a sample of
eucalyptol vapor had a density of 0.320 g*L-1. Calculate the molar mass of eucalyptol.
Group work QUIZ: Points for correct answer
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The oil produced from eucalyptus leaves contains the volatile organic compound eucalyptol. At 190 ºC and 60.0 Torr, a sample of eucalyptol vapor had a density of 0.320 g*L-1. Calculate the molar mass of eucalyptol.. a)63 g/mol b)154 g/mol c)0.01 g/mol d)10 g/mol
Group work QUIZ: Points for correct answer
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- Calculate the density of CO2 gas at 1.25 atm
and 300 K.
Group work QUIZ: Points for correct answer
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Using Gas Laws in Stoichiometry Problems
Consider the combustion of methanol, CH4, at STP.
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- If 15 L gas phase methanol at P=1 atm and
T=25°C reacts with excess oxygen in a combustion reaction, what volume of water vapor will be produced?
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If 5 L O2 reacts with 6 L H2, how many liters of water vapor could be produced?
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Calculate the volume of carbon dioxide, adjusted to 25 ºC and 1.0 atm , that plants need to make 1.00 g of glucose. 6CO2 (g) + 6H2O (l) C6H12O6 (s)+ 6O2 (g)
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What did we learn today?
CONCEPT OF NUMBER DENSITY vs MASS DENSITY UTILIZING PV=nRT TO DETERMINE DENSITY AND MOLAR MASS STOICHIOMETRY WITH GAS LAWS
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