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37 Cards in this Set
- Front
- Back
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What is the difference between an ideal gas and a real gas?
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Ideal imaginary/conforms to assumptions kinetic theory
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What are two conditions in which real gases most resemble ideal gases?
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Low pressure (P), high temperature (T)
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Explain why they can collapse in the experiment where we boiled water in it then inverted it into a pan of cold water
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Unbalanced outside force/atmospheric pressure
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Convert the pressure 1.50 atm to mm Hg
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760mmHg
1.50 atmx -------------- =1140 1atm mmHg |
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What does STP stand for and what are the values?
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Standard Temperature and Pressure
-0degrees C -1atm |
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Give the formula for each of the gas laws and write a sentence defining the relationship between the variables. (Boyle's, Charles' and Gay-Lussac's Laws)
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Boyle's- P1V1=P2V2
Charles'- V1=V2 --------- T1=T2 Gay-Lussac's- P1=P2 ---------- T1=T2 B.=constant temperature C.=constant pressure G.=constant volume |
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What is the relationship between temperature and pressure of a fixed quantity and volume of gas?
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P1=P2
---------- T1=T2 |
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If the volume of a gas at 750torr increases from 25.0mL to 32.0mL what is the new pressure?
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(750torr)(0.025)=P2(0.032)
---------------------- 0.032 P2=586torr |
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What is the pressure exerted by a gas at 50.0degreesC if the pressure at 75.0degreesC is 2.1atm?
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P1=P2
---------- T1=T2 P1=2.1 ---------- 323=348 P1=1.9atm |
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What is the formula for the combined gas law?
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P1V1=P2V2
------------------ T1 =T2 |
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The volume of a sample of hydrogen is 800mL and it exerts 700mmHg pressure at 15,00degreesC. What volume does it occupy at standart temperature and pressure?
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(700)(.8)=(760)(V2)
--------------------------- 288 =273 |
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What is the equivalent volume in liters of 1 mole of any gas at STP?
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1 mol=22.4 L
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What is the volume of 2.5moles of CO2 at STP?
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2.5mol x 22.4 L= 56 L
---------- 1 mol |
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What is the ideal gas law equation and what do each of the variables stand for?
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PV=nRT
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What is the gas constant, R, value with units?
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0.0821
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Calculate the approximate volume of a 0.5 mol sample of gas at 25.0degreesC and a pressure of 0.95atm
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0.95(V)=(0.5)(0.0821)(298)
---------- ------------------------- 0.95 0.95 |
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Explain what determines the average kinetic energy of the molecules of any gas and how can it be measured?
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Temperature
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Define:
-Crystalline solid -Amorphous solid |
-3D structure
-Random pattern |
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When any two processes proceed AT THE SAME RATE, the system is said to be in:
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Equilibrium
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Compare the density of solid, liquid and gas of a substance
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The density of a Solid is greater than the density of a Liquid, which is greater than the density of a Gas
S>L>G |
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How does the density of water differ from the generalization you made previously?
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Liquid is denser than Solids because of the hydrogen bonds
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Why does water boil at less than 100degreesC at higher altitudes?
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The atmospheric pressure is less at higher altitudes
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Define Volatile
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How easily something evaporates
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Acids make litmus paper turn _____, while bases make litmus paper turn _____.
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Acids=Red, Bases=Blue
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Bases react with asids to form ____ and _____.
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Salt and Water
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Which acid is in:
-Batteries -Soft drinks -Stomach acid |
-Sulfuric acid
-Phosphoric acid -Hydrochloric acid |
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A substance that ionizes nearly completly in aqueous solutions and produces H3O+ is a _______ ________.
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Strong Acid
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A substance that ionizes to form OH- ions is a _____.
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Base
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How do the members of a conjugate acid-base pair differ?
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They are different because the acid will always have an extra H ion
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The pH scale in general use ranges from:
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0-14
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the pH of an acidic solution ranges from:
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0-7
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The pH of a base ranges from:
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7-14
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A pH of 7 means a solution is _______.
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Neutral
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A solution with a pH of 11 is a _____.
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Base
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In the reaction HF + H20 - (H30+) + F-, a conjugate acid-base pair is_____.
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HF/F-
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Acid-base indicators are classified into types based on_____.
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pH range
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In a titration the endpoint is determined by _______.
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Measuring the pH
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