Thursday
April 24, 2014

Homework Help: Chemistry

Posted by Lori on Thursday, September 13, 2012 at 7:38pm.

15.0 moles of gas are in a 6.00L tank at 298.15K. Calculate the difference in pressure between methane and an ideal gas under these conditions. The van der Waals constants for methane are a=2.300 L^2*atm/mol^2 and b=0.0430 L/mol.

I found the idea gas pressure to be 61.2 atm by using the ideal gas law. However I can't seem to get the right value for the pressure of methane. Below are my workings, can anyone see what I'm doing wrong?

P= [(nRT)/(V-nb)] - [(an)^2/V^2]
P=[(15 mol*0.08206*298.15K)/(6.00L-(15mol*0.0430)] -[(15mol*2.3)^2/(6.00L)^2]
P=68.53-33.06
P=35.47 atm

Answer this Question

First Name:
School Subject:
Answer:

Related Questions

Chemistry - Chlorine gas, CL2 is used to purify water. How many moles of ...
chemistry - Imagine that you have a 5.00L gas tank and a 3.50L gas tank. You ...
Physics - A rigid tank contains 1.20 moles of an ideal gas. Determine the number...
Physics - A rigid tank contains 1.80 moles of an ideal gas. Determine the number...
chem - Imagine that you have a 7.00L gas tank and a 4.50L gas tank. You need to ...
physics - Question Part Points Submissions Used 1 /1 0/2 Total /1 A rigid tank...
Chemistry - You have a metal tank containing 74.0 moles of nitrogen gas at a ...
physics - A 22.0-L tank of carbon dioxide gas (CO2) is at a pressure of 9.40 105...
math - the gas tank in bob's car holds at most 15 gallons. He has already filled...
chemistry - Imagine that you have a 7.00 gas tank and a 3.50 gas tank. You need ...

Search
Members