Homework Help: chemistry URGENT!

Posted by mia on Sunday, October 24, 2010 at 11:56pm.

Many analytical instruments require liquid nitrogen. While filling an instrument with liquid nitrogen, an analytical chemist slips and spills the contents of the dewer, 25L, onto the floor. Since the boiling point of liquid nitrogen at 1atm is 77.4 K, all the nitrogen boils away to gas very quickly. The density of liquid nitrogen is 804kg/m^3. What volume of nitrogen gas is produced from the liquid nitrogen spill if the temperature of the room is 25 degrees C at 1 atm?

Is my calculations correct? Do i calculate the 77.4K in the problem?

If density = 804kg/mł
Mass 1 litre = 804g
25l = 25*804 20,125g
Molar mass N2 = 28g/mol
Mol of N2 = 20,125/28= 718.75 mol
At STP 1mol = 22.4 litres
Volume at STP = 718.75*22.4 = 16,100 litres
This is at 273K and 1 atm pressure
At 25°C = 298K and 1 atm

V1/T1 =V2/T2 (P is constant at 1 atm)
V1/298 = 16100/273
V1 = 16100*298/273
V1 = 17,574 litres.
Volume of N2 gas produced = 17,574 litres.

chemistry URGENT! - mia, Monday, October 25, 2010 at 12:33am
Is this right?????
chemistry URGENT! - DrBob222, Monday, October 25, 2010 at 3:46pm
25*804 = 20,100 and that error carries through. I think it's easier to convert 20,100 to moles and use PV = nRT but I don't see anything wrong with yours other than the initial multiplication error.
chemistry URGENT! - jose, Monday, March 28, 2011 at 10:53pm
No you fuc*ing morons...

Answer this Question

Related Questions

chemistry - Many analytical instruments require liquid nitrogen. While filling ...
Chemistry - Many analytical instruments require liquid nitrogen. While filling ...
chm - Liquid nitrogen is obtained by condensing gaseous nitrogen found in air ...
chemistry - A 1.5-L container of liquid nitrogen is kept in a closet measuring ...
Chem 105 - A 1.5-L container of liquid nitrogen is kept in a closet measuring 1....
chemistry - Liquid nitrogen-powered car students at the university of north ...
chemistry - Liquid nitrogen, which has a boiling point of 77 K, is commonly used...
chemistry - 1. Pouring liquid nitrogen onto a balloon decreases the volume of ...
chemistry 1 - If the mas of liquid nitrogen originally placed in the flask was 1...
Material Physics - Gaseous nitrogen has a density of 1.17 kg/m3 and liquid ...

For Further Reading

First Name:
School Subject:
Answer: