Lab 6 - Gas Laws (1) (2).docx - Lab 6 – Gas Laws Introduction This experiment involves making relatively simple measurements that provide data for

Lab 6 - Gas Laws (1) (2).docx - Lab 6 – Gas Laws...

This preview shows page 1 - 2 out of 4 pages.

Lab 6 – Gas Laws Introduction This experiment involves making relatively simple measurements that provide data for calculations using the ideal gas law to determine the molar mass of a gas. The principle objective is to help to understand and practice using the gas law so that we can use it to predict gas properties and to calculate amounts of gases in stoichiometry. The ideal gas law has several forms. The principle form is: PV=nRT where P is pressure, V is volume, n is the number of moles of gas, R is a constant and T is the absolute temperature. When the units of pressure, volume and temperature are atmospheres, liters, and Kelvins respectively, the value of R is 0.0821 (atm*L)/(mol*K). Atmospheres are not a metric unit, but are still in common use. Since our objective will be to find the molar mass of a sample, we need to separately determine the mass and number of moles in the sample. We will obtain the mass by weighing and the number of moles will be found indirectly: by finding the pressure, volume, and temperature of the gas sample and solving the gas law for n. The sample gas will be the natural gas used as the fuel for burners in the lab. We will refer to it as “lab gas” for short. Natural gas is not a substance; it is a mixture. So, technically, we are finding the average molar mass of gases in this mixture. You will determine both the molar mass and its density. Part of the experiment will require you to make some “corrections” in mass given the fact that there is air everywhere (especially in your lab containers!). Table 1 below gives information about the density of air at varying temperatures and pressures.
Image of page 1

Subscribe to view the full document.

Image of page 2
  • Spring '17
  • Melissa

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern

Ask Expert Tutors You can ask 0 bonus questions You can ask 0 questions (0 expire soon) You can ask 0 questions (will expire )
Answers in as fast as 15 minutes