At STP (Standard Temperature and Pressure 273 K and 1 atm) we are able to use Avogadro’s number of 22.4 L per mole of gas or
22.4 L/mole as our conversion factor in the .
EXAMPLE
How many liters of hydrogen gas are necessary to react with 10 grams of nitrogen to produce ammonia at standard temperature and pressure?
We begin with a balanced chemical equation
##N_2 + 3H_2 -> 2NH_3##
Now using the given value of 10 grams of nitrogen we will convert using stoichiometry
##grams N_2 -> mol N_2 -> mol H_2 -> Liters H_2##
##10 g N_2 x (1 mol N_2)/(28 g N_2) = 0.357 mol N_2##
(remember ##N_2## , 2 x 14 g = 28 g)
Use ratio from the balanced chemical equation to convert moles of ##N_2## to moles of ##H_2##
##0.357 mol N_2 x (3 mol N_2)/(1 mol N_2) = 1.071 mol H_2##
Now use Avogadro’s number 22.4 L/mol to convert moles of ##H_2## to Liters of ##H_2##.
##1.071 mol H_2 x (22.4 L H_2)/(1 mol H_2) = 23.99 L H_2##
Remember, we can only use the 22.4 L/mole value if the reaction is taking place at Standard Temperature and Pressure (STP = 0 C and
1 atm).
Here’s a video that might be helpful:
Our website has a team of professional writers who can help you write any of your homework. They will write your papers from scratch. We also have a team of editors just to make sure all papers are of HIGH QUALITY & PLAGIARISM FREE. To make an Order you only need to click Ask A Question and we will direct you to our Order Page at WriteDemy. Then fill Our Order Form with all your assignment instructions. Select your deadline and pay for your paper. You will get it few hours before your set deadline.
Fill in all the assignment paper details that are required in the order form with the standard information being the page count, deadline, academic level and type of paper. It is advisable to have this information at hand so that you can quickly fill in the necessary information needed in the form for the essay writer to be immediately assigned to your writing project. Make payment for the custom essay order to enable us to assign a suitable writer to your order. Payments are made through Paypal on a secured billing page. Finally, sit back and relax.
About Writedemy
We are a professional paper writing website. If you have searched a question and bumped into our website just know you are in the right place to get help in your coursework. We offer HIGH QUALITY & PLAGIARISM FREE Papers.
How It Works
To make an Order you only need to click on “Place Order” and we will direct you to our Order Page. Fill Our Order Form with all your assignment instructions. Select your deadline and pay for your paper. You will get it few hours before your set deadline.
Are there Discounts?
All new clients are eligible for 20% off in their first Order. Our payment method is safe and secure.