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THERMOCHEMISTRY or Thermodynamics
... • Gay-Lussac showed that a plot of V versus T was a straight line that could be extrapolated to – 273.15ºC at zero volume, a theoretical state. • The slope of the plot of V versus T varies for the same gas at different pressures, but the intercept remains constant at –273.15ºC. • Significance of the ...
... • Gay-Lussac showed that a plot of V versus T was a straight line that could be extrapolated to – 273.15ºC at zero volume, a theoretical state. • The slope of the plot of V versus T varies for the same gas at different pressures, but the intercept remains constant at –273.15ºC. • Significance of the ...
Characteristic Properties Non-Characteristic Properties
... Characteristic Properties Examples (cont.) Melting Point: The temperature at which a substance changes from a solid to a liquid Boiling Point: The temperature at which a substance changes from a liquid to a gas ...
... Characteristic Properties Examples (cont.) Melting Point: The temperature at which a substance changes from a solid to a liquid Boiling Point: The temperature at which a substance changes from a liquid to a gas ...
Exam Review_Key_All Topics.082
... 1. What is the purpose of a fractionating column and how does it work? A Fractionating column is used to separate a mixture into its component parts by differences in boiling points. The fractionating column is filled with beads that allow for condensation. The bottom of the flask is heated and the ...
... 1. What is the purpose of a fractionating column and how does it work? A Fractionating column is used to separate a mixture into its component parts by differences in boiling points. The fractionating column is filled with beads that allow for condensation. The bottom of the flask is heated and the ...
Lecture 2 - Columbia University
... Equal volumes of any gas (measured at the same temperature and volume) contain equal numbers of “particles”. The quotes are put about “particles” because Avogadro did not want to differential between atoms and molecules as particles. The remarkable feature of this hypothesis is that it implies that ...
... Equal volumes of any gas (measured at the same temperature and volume) contain equal numbers of “particles”. The quotes are put about “particles” because Avogadro did not want to differential between atoms and molecules as particles. The remarkable feature of this hypothesis is that it implies that ...
INERT GASES -
... contribution. The net force operating on the represel ktative molecule can be expressed as a "two-body" force, acting between the molecule on one hand and its neighbors on the oth er. The bulk property is then obtained by adding up these effects for all the molecules which are present, assuming that ...
... contribution. The net force operating on the represel ktative molecule can be expressed as a "two-body" force, acting between the molecule on one hand and its neighbors on the oth er. The bulk property is then obtained by adding up these effects for all the molecules which are present, assuming that ...
Multiple Choice Practice. A) P B) S C) Cl D) Li E) 1 F 1. Has the
... A) The vapor pressure of the solid phase equals the vapor pressure of the liquid phase B) The temperature is 0.01K lower than the normal melting point C) The liquid and gas phases have the same density and are therefore indistinguishable D) The solid phase melts if the pressure increases at constan ...
... A) The vapor pressure of the solid phase equals the vapor pressure of the liquid phase B) The temperature is 0.01K lower than the normal melting point C) The liquid and gas phases have the same density and are therefore indistinguishable D) The solid phase melts if the pressure increases at constan ...
QUESTION
... Gas Laws – 50 Points QUESTION: A gas is confined in a steel tank. At 10.30°C, the gas exerts a pressure of 9.532 atm. After heating the tank, the pressure of the gas increases to 11.606 atm. What is the temperature of the heated gas? ANSWER: ...
... Gas Laws – 50 Points QUESTION: A gas is confined in a steel tank. At 10.30°C, the gas exerts a pressure of 9.532 atm. After heating the tank, the pressure of the gas increases to 11.606 atm. What is the temperature of the heated gas? ANSWER: ...
The Wizard Test Maker
... that of magnesium oxide? (A) The O2– is more negatively charged than the Cl– ion. (B) The Cl– ion is larger than the O2– ion. (C) The Mg2+ is more positively charged than the Na+ ion. (D) Choices A and C are correct. (E) Choices B and C are correct. 125. What is main reason the boiling point of meth ...
... that of magnesium oxide? (A) The O2– is more negatively charged than the Cl– ion. (B) The Cl– ion is larger than the O2– ion. (C) The Mg2+ is more positively charged than the Na+ ion. (D) Choices A and C are correct. (E) Choices B and C are correct. 125. What is main reason the boiling point of meth ...
apchem - practice midterm_shs
... mark completely, and then record your new answer. Mark only one answer for each question. Many candidates wonder whether or not to guess the answers to questions about which they are uncertain. In this section of the examination, as a correction for haphazard guessing, one-fourth of the number of qu ...
... mark completely, and then record your new answer. Mark only one answer for each question. Many candidates wonder whether or not to guess the answers to questions about which they are uncertain. In this section of the examination, as a correction for haphazard guessing, one-fourth of the number of qu ...
How many grams of oxygen are made if 3.75 moles of KClO 3
... 11. The characteristic odor of garlic is due to allyl sulfide (C3H5)2S. A recipe for hummus calls for garlic that contains no more than 6.89 mol of allyl sulfide. You were hired by Cedar as a chemistry consultant to calculate the maximum mass of allyl sulfide that should be included in the recipe fo ...
... 11. The characteristic odor of garlic is due to allyl sulfide (C3H5)2S. A recipe for hummus calls for garlic that contains no more than 6.89 mol of allyl sulfide. You were hired by Cedar as a chemistry consultant to calculate the maximum mass of allyl sulfide that should be included in the recipe fo ...
Liquid chromatography: a tool for the analysis of metal species
... of the separating resin. Ligands are also required to avoid precipitation when an acidic eluent is not suitable for the columns selected. A low-capacity silica-based cation-exchange column was used for the separation of transition metals (Co, Cu, Fe) and coupled with post-column chemiluminescence de ...
... of the separating resin. Ligands are also required to avoid precipitation when an acidic eluent is not suitable for the columns selected. A low-capacity silica-based cation-exchange column was used for the separation of transition metals (Co, Cu, Fe) and coupled with post-column chemiluminescence de ...
de Caux - Combustion of Methane Demonstration
... Combustion is the reaction of a substance with oxygen to produce oxides, light and heat. Most combustion reactions involve organic compounds. The combustion of methane is an example of an exothermic reaction. More energy is released when the bonds in the products are formed than is used to break the ...
... Combustion is the reaction of a substance with oxygen to produce oxides, light and heat. Most combustion reactions involve organic compounds. The combustion of methane is an example of an exothermic reaction. More energy is released when the bonds in the products are formed than is used to break the ...
2016 - Specimen Paper 4 - Cambridge International Examinations
... Use the kinetic theory to explain why the pressure inside the container increases when the temperature is increased. ...
... Use the kinetic theory to explain why the pressure inside the container increases when the temperature is increased. ...
Chem EOC Review Cumulative Free Response
... 78) (Remember, to determine number of bonds, count VE’s, determine how many more are needed to make 8 [or 2 if it it Hydrogen] and that is the number of covalent bonds needed.) 79) Covalent bonding occurs between a ___________ and a _____________. 80) Which compound has the longest bond, HF or HCl? ...
... 78) (Remember, to determine number of bonds, count VE’s, determine how many more are needed to make 8 [or 2 if it it Hydrogen] and that is the number of covalent bonds needed.) 79) Covalent bonding occurs between a ___________ and a _____________. 80) Which compound has the longest bond, HF or HCl? ...
Unit 2 matter - Kowenscience.com
... physical & chemical properties a) Physical Properties: Properties that can be observed and measured without changing the chemical composition of a substance ...
... physical & chemical properties a) Physical Properties: Properties that can be observed and measured without changing the chemical composition of a substance ...
pdf AP Chemistry Summer Assignment 2014 Dr. Hart`s classes
... Review Questions from Brown and LeMay: Chemistry the Central Science, 11th edition Chapter 1 “Introduction: Matter and Measurement” Assignments Classification and Properties of Matter: Exercises: p.31: #11,15,16 11. Classify each of the following as a pure substance or a mixture; if a mixture, indic ...
... Review Questions from Brown and LeMay: Chemistry the Central Science, 11th edition Chapter 1 “Introduction: Matter and Measurement” Assignments Classification and Properties of Matter: Exercises: p.31: #11,15,16 11. Classify each of the following as a pure substance or a mixture; if a mixture, indic ...
Honors Chemistry Semester 1 Exam Review
... If 25.0 grams of carbon dioxide are used in photosynthesis how many moles of glucose (C6H12O6) could be Produced according to the following equation: 6CO2 + 6H2O C6H12O6 + 6O2 ...
... If 25.0 grams of carbon dioxide are used in photosynthesis how many moles of glucose (C6H12O6) could be Produced according to the following equation: 6CO2 + 6H2O C6H12O6 + 6O2 ...
Mass-Mass Stoichiometry
... 64. An experiment is performed to determine the Specific Heat Capacity of an unknown metal. The 55.0 gram piece of metal is placed in a boiling water bath. Meanwhile, a calorimeter is filled with 80.0 mL of water. The temperature of the water in the calorimeter is determined to be 25.0C. The metal ...
... 64. An experiment is performed to determine the Specific Heat Capacity of an unknown metal. The 55.0 gram piece of metal is placed in a boiling water bath. Meanwhile, a calorimeter is filled with 80.0 mL of water. The temperature of the water in the calorimeter is determined to be 25.0C. The metal ...
0191 271 0222 Nitrogen (Oxygen Free)
... Do not store LPG cylinders within three metres of other gas cylinders The use of a firewall reduces the distance to 1.5 meters There are specific requirements for certain products. Storage of cryogenic, liquefied (e.g. Propane) and heavier than air compressed gases should be sited with due regard to ...
... Do not store LPG cylinders within three metres of other gas cylinders The use of a firewall reduces the distance to 1.5 meters There are specific requirements for certain products. Storage of cryogenic, liquefied (e.g. Propane) and heavier than air compressed gases should be sited with due regard to ...
Chapter 9 Gases worksheet
... 11. You must be able to carry out calculations in gas chemical reactions and apply the law of combining volumes. 12. Go through Sample Exercise 9.8 including the Practice Exercise. 13. You must understand how gases behave when they mix together, Dalton’s law of partial pressures and the concept of m ...
... 11. You must be able to carry out calculations in gas chemical reactions and apply the law of combining volumes. 12. Go through Sample Exercise 9.8 including the Practice Exercise. 13. You must understand how gases behave when they mix together, Dalton’s law of partial pressures and the concept of m ...
compound
... A chocolate chip cookie is an example of a __________, because ______________. a. compound, the ingredients are chemically bonded. b. compound, it is the same throughout. c. mixture, you can separate out the chips. d. mixture, you cannot distinguish between the ingredients. ...
... A chocolate chip cookie is an example of a __________, because ______________. a. compound, the ingredients are chemically bonded. b. compound, it is the same throughout. c. mixture, you can separate out the chips. d. mixture, you cannot distinguish between the ingredients. ...
Holt Chemistry – Guided Notes, Chapter 1
... Solid – particles vibrate in place Liquid – particles moving, sliding past each other Gas – constant, random, straight-line motion 6. Give three examples each of physical and chemical changes. Physical – change of state, same substance remains before and after Chemical – one or more new substances f ...
... Solid – particles vibrate in place Liquid – particles moving, sliding past each other Gas – constant, random, straight-line motion 6. Give three examples each of physical and chemical changes. Physical – change of state, same substance remains before and after Chemical – one or more new substances f ...
www.tutor-homework.com (for tutoring, homework help, or help with
... A given mass of gas in a rigid container is heated from 100 to 500øC. Which of the following responses best describes what will happen to the pressure of the gas? a. The pressure will increase by a factor less than five. b. The pressure will decrease by a factor of five. c. The pressure will increas ...
... A given mass of gas in a rigid container is heated from 100 to 500øC. Which of the following responses best describes what will happen to the pressure of the gas? a. The pressure will increase by a factor less than five. b. The pressure will decrease by a factor of five. c. The pressure will increas ...
Gas chromatography
![](https://commons.wikimedia.org/wiki/Special:FilePath/Gaschromatograph.jpg?width=300)
Gas chromatography (GC) is a common type of chromatography used in analytical chemistry for separating and analyzing compounds that can be vaporized without decomposition. Typical uses of GC include testing the purity of a particular substance, or separating the different components of a mixture (the relative amounts of such components can also be determined). In some situations, GC may help in identifying a compound. In preparative chromatography, GC can be used to prepare pure compounds from a mixture.In gas chromatography, the mobile phase (or ""moving phase"") is a carrier gas, usually an inert gas such as helium or an unreactive gas such as nitrogen. The stationary phase is a microscopic layer of liquid or polymer on an inert solid support, inside a piece of glass or metal tubing called a column (a homage to the fractionating column used in distillation). The instrument used to perform gas chromatography is called a gas chromatograph (or ""aerograph"", ""gas separator"").The gaseous compounds being analyzed interact with the walls of the column, which is coated with a stationary phase. This causes each compound to elute at a different time, known as the retention time of the compound. The comparison of retention times is what gives GC its analytical usefulness.Gas chromatography is in principle similar to column chromatography (as well as other forms of chromatography, such as HPLC, TLC), but has several notable differences. First, the process of separating the compounds in a mixture is carried out between a liquid stationary phase and a gas mobile phase, whereas in column chromatography the stationary phase is a solid and the mobile phase is a liquid. (Hence the full name of the procedure is ""Gas–liquid chromatography"", referring to the mobile and stationary phases, respectively.) Second, the column through which the gas phase passes is located in an oven where the temperature of the gas can be controlled, whereas column chromatography (typically) has no such temperature control. Finally, the concentration of a compound in the gas phase is solely a function of the vapor pressure of the gas.Gas chromatography is also similar to fractional distillation, since both processes separate the components of a mixture primarily based on boiling point (or vapor pressure) differences. However, fractional distillation is typically used to separate components of a mixture on a large scale, whereas GC can be used on a much smaller scale (i.e. microscale).Gas chromatography is also sometimes known as vapor-phase chromatography (VPC), or gas–liquid partition chromatography (GLPC). These alternative names, as well as their respective abbreviations, are frequently used in scientific literature. Strictly speaking, GLPC is the most correct terminology, and is thus preferred by many authors.