Ask Question
31 July, 15:18

What is the volume of 14.0g of nitrogen gas at STP?

+2
Answers (1)
  1. 31 July, 15:44
    0
    The volume of 14.0 g of nitrogen gas at STP is 11.2 liter.

    Explanation:

    STP stands for standard pressure and temperature.

    The International Institute of of Pure and Applied Chemistry, IUPAC changed the definition of standard temperature and pressure (STP) in 1982:

    Before the change, STP was defined as a temperature of 273.15 K and an absolute pressure of exactly 1 atm (101.325 kPa).

    After the change, STP is defined as a temperature of 273.15 K and an absolute pressure of exactly 105 Pa (100 kPa, 1 bar).

    Using the ideal gas equation of state, PV = nRT you can calculate the volume of one mole (n = 1) of gas. With the former definition, the volume of a mol of gas at STP, rounded to 3 significant figures, was 22.4 liter. This is classical well known result.

    With the later definition, the volume of a mol of gas at STP is 22.7 liter.

    I will use the traditional measure of 22.4 liter per mole of gas.

    1) Convert 14.0 g of nitrogen gas to number of moles:

    n = mass in grams / molar mass Atomic mass of nitrogen: 14.0 g/mol Nitrogen gas is a diatomic molecule, so the molar mass of nitrogen gas = molar mass of N₂ = 14.0 * 2 g/mol = 28.0 g/mol n = 14.0 g / 28.0 g/mol = 0.500 mol

    2) Set a proportion to calculate the volume of nitrogen gas:

    22.4 liter / mol = x / 0.500 mol Solve for x: x = 0.500 mol * 22.4 liter / mol = 11.2 liter.

    Conclusion: the volume of 14.0 g of nitrogen gas at STP is 11.2 liter.
Know the Answer?
Not Sure About the Answer?
Find an answer to your question 👍 “What is the volume of 14.0g of nitrogen gas at STP? ...” in 📗 Chemistry if the answers seem to be not correct or there’s no answer. Try a smart search to find answers to similar questions.
Search for Other Answers