Avogadros Law Example Problem

Avogadros Law Example Problem Avogadros gas law states the volume of a gas is proportional to the number of moles of gas present when the temperature and pressure are held constant. This example problem demonstrates how to use Avogadros law to determine the volume of a gas when more gas is added to the system. Avogadro's Law Equation Before you can solve any problem regarding Avogadros gas law, its important to review the equation for this law. There are a few ways to write this  gas law, which is a mathematical relation. It may be stated: k V/n Here, k is a proportionality constant, V is the volume of a gas, and n is the number of moles of a gas. Avogadros law also means the ideal gas constant is the same value for all gases, so: constant p1V1/T1n1   P2V2/T2n2V1/n1   V2/n2V​1n2   V2n1 where p is pressure of a gas, V is volume, T is temperature, and n is number of moles. Avogadro's Law Problem A 6.0 L sample at 25 °C and 2.00 atm of pressure contains 0.5 mole of a gas. If an additional 0.25 mole of gas at the same pressure and temperature are added, what is the final total volume of the gas? Solution First, express Avogadros law by its  formula: Vi/ni Vf/nfwhereVi initial volumeni initial number of molesVf final volumenf final number of moles For this example, Vi 6.0 L and ni 0.5 mole. When 0.25 mole is added: nf ni 0.25 molenf 0.5 mole 0.25 molenf 0.75 mole The only variable remaining is the final volume. Vi/ni Vf/nf Solve for Vf Vf ​ Vinf/niV​f (6.0 L x 0.75 mole)/0.5 moleVf 4.5 L/0.5 Vf 9 L Check to see if the answer makes sense. You would expect the volume to increase if more gas is added. Is the final volume greater than the initial volume? Yes. Doing this check is useful because it is easy to put the initial number of moles in the numerator and the final number of moles in the denominator. If this had happened, the final volume answer would have been smaller than the initial volume. Thus, the final volume of the gas is 9.0 Notes Regarding Avogadro's Law Unlike Avogadros number, Avogadros law was actually proposed by   Amedeo Avogadro. In 1811, he hypothesized two samples of an ideal gas with the same volume and at the same pressure and temperature contained the same number of molecules.Avogadros law is also called Avogadros principle or Avogadros hypothesis.Like the other ideal gas laws, Avogadros law only approximates the behavior of real gases. Under conditions of high temperature or pressure, the law is inaccurate. The relation works best for gases held at low pressure and ordinary temperatures. Also, smaller gas particles- helium, hydrogen, and nitrogen- yield better results than larger molecules, which are more likely to interact with each other.Another mathematical relation used to express Avogadros law is: V/n k Here, V is the volume, n is the number of moles of the gas, and k is the proportionality constant. Its important to note this means the ideal gas constant is the same for all gases.

Easy Steps to Get Book Review Writing Help

Easy Steps to Get Book Review Writing Help One of the typical tasks for students in different educational institutions is a book review. The reason for it is clear – you dont only need to read a book, but your teachers want you to think while reading, analyze all the thoughts and ideas you come across. If you have to write a book review and need to consult someone to cope with the task well – this article is just for you. The very first step you have to take is to choose a book, unless it is already chosen for you by your teacher. If not, try to make your task more enjoyable by choosing a book you like, or the one you have already read and know it well. That way you can both cope with the task and enjoy reading. So, writing a good book review requires you to read a book at least twice. The first time you read you have to concentrate on the plot, main characters, and the general idea and subject-matter of a book. Having done that, you will definitely have some ideas of how and what to write in a review. Thats why you had better take notes, even if you think that the idea is not worth it. So, the second time you read a book, you will have to pay attention to small details like figures of speech, stylistic devices, authors unique writing style, or you may also write down some quotations you want to use in your review. Once you have done that, you will need to write a plan of your review. It is also a good idea to do so, because it will help you express all your thoughts in a logical order. By the way, you also have to mind your grammar and punctuation. Once the review is ready, it is advisable to read it once again to avoid mistakes. If all of the written above seems to be too complicated for you to cope with, or you dont really have enough time to write your review, you will definitely want some help. That is what our custom writing service does. Choose from a wide range of tasks that can be easily written by our skillful and experienced writers. So, if you really feel you need help, fill out an order form and specify all the details of your order. Tell the writers what exactly you need and we will do our best to satisfy your demands. The writer assigned to work on your order will read a book and write a review taking into consideration all your requirements. Writing book reviews with us is fast and easy.