Tuesday

July 29, 2014

July 29, 2014

Posted by **Lauren** on Friday, February 10, 2012 at 12:58am.

w = ____ J

now calculate the work done if this process is carried out in two steps.

1] first let, the gas expand against a constant external pressure of 5.00 atm to a volume of 4.00 L.

2] From there, let the gas expand to 20.0 L against a constant external pressure of 1.00 atm.

w = _____ J

i know that the formula to solve this is w=-(p)(Delta V) but when they give you 2 pressures does that mean the formula turns to w=-(delta p)(delta v)?

- Chemistry -
**DrBob222**, Friday, February 10, 2012 at 1:44am1)

-Pdelta V = -1 atm x (v2-v1) = -1(20-1) = -19 L*atm work.

2)

The first one is -5 x (4-1) = -15 L*atm

Second stage is -1 x (20-4) = -16 L*atm

Total = -31 L*atm

Here is a good site you can read; in fact there is an example problem that is ALMOST the same as this one.

(Broken Link Removed)

- Chemistry -
**Lauren**, Friday, February 10, 2012 at 2:51amThank you Dr. Bob! That was very helpful

- Chemistry -
**DrBob222**, Friday, November 29, 2013 at 4:17pmNo prob. I always help sexy ladies ~

**Related Questions**

Chemistry - Consider an ideal gas encloesd in a 1.00 L container at an internal ...

chemistry - ideal gas .450 mole initial pressure 16 atm and 290 K expands ...

chemistry - An ideal gas is allowed to expand isothermally from 2.00 L at 5.00 ...

chemistry - A sample of an ideal gas at 15.0 atm and 10.0 L is allowed to expand...

Chemistry - A sample of an ideal gas at 15.0 atm and 10.0 L is allowed to expand...

Chemistry - A gas expands from 282 mL to 971 mL at constant temperature....

Genera Chemistry - A certain gas expands in volume from 1.75 L to 8.32 L at ...

Chemistry - You have 1L of an ideal gas at 0 degree celsius and 10 atm pressure...

physics - Initially 1.200 mol of an ideal gas in a container occupies a volume ...

Physics - Initially 1.200 mol of an ideal gas in a container occupies a volume ...