Gas Essays

Chromatography means "color writing" literally from the Greek words chroma and graphe. It is a separating technique for a mixture of chemicals, which can be in gas or liquid form, by letting them creep slowly past another substance. There are two important things in chromatography that is it must has one state of matter such as gas or liquid, that is known as mobile phase, moving over the surface of another state of matter which can be liquid or solid that stays where it is that is known as stationary

Gas Exchange in Mammals A mammal is a warm-blooded animal and because of their ability to maintain the same body temperature in all climates they are able to be more active than other animals. They all have hair present on their body during some time of their life, and they have mammary glands from which the females produce milk from to nurse their babies. In mammals their gas exchange system, the lungs, is located inside their bodies to reduce water loss and prevent desiccation. Oxygen enters the

This lab contains two experiments that both test the knowledge of the gas law and how it applies to the state that is necessary to form a cloud and to calculate the rate of effusion of CO2 (carbon dioxide) leaving a balloon. If carbon dioxide is placed into a balloon for a period of time, then the carbon dioxide will effuse out of the balloon at a linear rate, because of the pressure that the gas is placing on the wall of the balloon that will allow it to escape from the balloon's microscopic pores

The purpose of this lab was to determine the molar volume of Hydrogen gas and compare it with the value predicted by the Ideal Gas Law. In this lab, I was able to calculate the number of moles of H2 produced and measure the volume of H2 gas produced and also notice how the volume, temperature and pressure changed when it had a reaction with different amounts of Zinc. In the first experiment, I determined the change of temperature, pressure and volume in Hydrogen differing from its initial temperature

The purpose of this lab is to use the combined gas law to find the new volume of the can after the temperature has changed. Also in this lab, the volume changes again and it is found using water displacement. The dependent variable in this lab would be the volume. The independent variable in this lab would be the temperature. Under the microscope, solids can be seen as particles in a highly ordered or fixed position. Liquids can be seen as particles that can move loosely and start to show some

CRITICAL REVIEW OF THE APPLICATION OF GAS CHROMATOGRAPHY MASS SPECTROMETRY IN PESTICIDE ANALYSIS FROM BODY FLUIDS. Introduction Gas chromatography mass spectrometry (GCMS) is the most suitable technique for the diagnosis of disorders of organic acid metabolism, known as organic acidurias. In other words organic acidurias are also commonly known as insecticide, pesticides, herbicides and fungicides. The first applications analysis of GCMS began in the early 1990s. The process of application of

1.4.3 Analytical methods Gas chromatography is the most commonly applied method for the analysis of trace components in human breath. In gas chromatography the compounds are vaporized and separated according to their boiling points. Flame ionization detection (FID) is one of the most common detection methods, as GC-FID exhibits high sensitivity, large linear response range and low noise. The drawback of GC-FID is the identification, which is retention time based only. Retention times in GC are poorly

A volatile liquid can be easily converted to its gaseous state, the gas that forms from vaporization is known as vapor and it is assumed to behave as an ideal gas. One of the properties that characterize a volatile liquid is determination of its molar mass. Dumas method also known as the vapor density method uses the vapor density of the unknown volatile liquid in determining its molar mass. The major assumptions of these methods are the substance behaves ideally. The molar mass of a volatile liquid

Gas Chromatography Principle: A sample to be analysed is injected into the chromatography instrument. The sample solution enters a gas stream which transports the sample into a separation tube which is also known as the column. Various components in the sample solution separated inside the column. GC has principles similar to fractional distillation. Both processes separate mixture based on boiling point. Fractional distillation does it on a larger scale whereas GC does it on a small scale Source:

In this experiment, preparative gas chromatography was performed to isolate components present in a mixture before infrared spectroscopy was utilized to determine the separated parts. At the start of the lab, unknown # C-2 at 170C was provided for testing. When the GC was ran, the retention time for fraction 1 started with 2.12 minutes and ended with 2.96 minutes. The retention time for fraction 2 started at 4.56 minutes and ended at 5.96 minutes. After centrifugation, a small amount of the sample

Interestingly enough, Boyle's gas law, Gay-Lussac's gas law, and Avogadro's gas law are connected in a way similar to how branches are connected to a tree. If the Ideal gas law can be considered the 'trunk' of the tree, then Boyle's, Gay- Lussac's , and Avogadro's gas laws are the 'branches'. To better understand this analogy, it is important to understand how each of the laws can be derived from the Ideal Gas Law. Gay-Lussac's law states that the pressure of an ideal gas is directly proportional to

Gas Laws/Acids and Bases C2H4O2+NaHCO3--->NaC2H3O2+H2O+CO2 Pressure.Gases are the only state of matter that can be compressed very tightly or expanded to fill a very large space. Pressure is force per unit area. The earth's gravity acts on air molecules to create a force, that of the air pushing on the earth. This is called atmospheric pressure. The units of pressure that are used are pascal (Pa), standard atmosphere (atm), and torr. 1 atm is the average pressure at sea level. It is usually used

The goal of the experiment is to determine the molar mass of an unknown liquid using the Ideal Gas Law and once it is found the empirical and molecular formula could be determine. The theory behind this experiment is the idea that if the pressure, volume, number of moles and temperature are all constant we could easily use the Ideal gas law equation to find the molar mass of a gas. obtain this information we would need to heat up and unknown liquid in a closed flask in boiling water and once the

and Temperature of a Gas By: Jasmine Camacho In this experiment I used both the Boyle’s and the Charles gas laws. Boyle's law states “the volume of a given quantity of a gas varies inversely as the pressure, the temperature remaining constant”. The formula used to help complete this process is PV=constant. Charles law help explain the relationship between temperature and gas volume. And the formula for this is V/T=constant. For this experiment I used the ideal gas law; pV=nRT. In this

Name: Institution: Course: Instructor: Date of Submission: Absolute zero Abstract The purpose of this laboratory was to apply the ideal gas law and temperature and pressure measurements to extrapolate absolute zero value on a Celsius scale. This was done by recording Pressure and temperature measurement values for different n values. In addition, linear fit graphs of pressure versus temperature were plotted for the different n values. The absolute temperature value was then determined from the

INTRODUCTION A gas chromatograph (GC) can be utilized to analyze the contents of a sample quantitatively or in certain circumstances also qualitatively. In the case of preparative chromatography, a pure compound can be extracted from a mixture. The principle of gas chromatography can be explained as following: A micro syringe is used to inject a known volume of vaporous or liquid analyte into the head or entrance of a column whereby a stream of an inert gas acts a carrier (mobile phase). The column

Abstract Gas chromatography (GC) and high performance liquid chromatography (HPLC) is an important technique which is used for the analysis of mixtures. In these instruments the mixture allows mixtures the instrument allows mixtures to separate in each components and determine the amounts of components present in sample. By using GC and HPLC we can analyzed a very small (microliters) sample. The sample which we want to analyze by GC must be volatile. The vaporized sample is allowed to flow in along

Name Instructor Course Date Absolute Zero Introduction In this lab, temperature and pressure measurements as well as the Ideal Gas Law will be used to extrapolate the absolute zero value on the Celsius scale. Theoretical Background The interaction of molecules via random collisions creates an ideal gas where the temperature, T, volume, V, and pressure, P, relate according to equation [1]. For a rigid container, the volume is assumed to be constant, where equation [1] can be rewritten as shown in

Natural gas is primarily composed of methane; the main products of combustion of natural gas are carbon dioxide and water vapor; same compounds that are exchaled when breathing. Coal and oil are composed of much more complex molecules with higher carbon ratio and higher nitrogen and sulfur contenents. When combusted, coal and oil release a higher level of harmful emissions that are dangerous to the environment. Coal and fuel oil release ash particles on the environment that are substance that do

Have you ever been to the gas station and thought to yourself "why are these gas prices so high"? You may have even thought about cutting back some of your driving. When gas goes up it seems like the whole world may have turned their backs on you. In fact, Americans have an unquenchable thirst for gasoline. You could look at the amount of traffic on roads and highways, and you'll see that if a severe gas shortage were to happen it would cripple the United States into shambles. It has been proven