Chemistry

Consider an ideal gas encloesd in a 1.00 L container at an internal pressure of 10.0 atm. Calculate the work, w, if the gas expands against a constant external pressure of 1.00 atm to a final volume of 20.0 L.
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)?

  1. 👍
  2. 👎
  3. 👁
  4. ℹ️
  5. 🚩
  1. 1)
    -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)

    1. 👍
    2. 👎
    3. ℹ️
    4. 🚩
  2. Thank you Dr. Bob! That was very helpful

    1. 👍
    2. 👎
    3. ℹ️
    4. 🚩
  3. 2=2

    1. 👍
    2. 👎
    3. ℹ️
    4. 🚩
  4. thanks SO much dr bob this was SO helpful ;);;:;:);0));)

    1. 👍
    2. 👎
    3. ℹ️
    4. 🚩
  5. wow ilovedrbob69 that was so not helpful :)

    1. 👍
    2. 👎
    3. ℹ️
    4. 🚩
  6. I love ihateilovedrbob69 >w<

    1. 👍
    2. 👎
    3. ℹ️
    4. 🚩

Respond to this Question

First Name

Your Response

Similar Questions

  1. CHEM

    A) a picture shows a container that is sealed at the top by a movable piston. Inside the container is a ideal gas at 1.00atm , 20.0 *C, and 1.00L. (The pic is of a 2L container which has a piston pushed downward to the 1L level.

  2. physics

    pls.. help me with this i really need it.. pls. A gas in a cylinder expands from a volume of 0.110 m3 to 0.320 m3. Heat flows into the gas just rapidly enough to keep the pressure constant at 1.65 x 105 Pa during the expansion.

  3. physics/chemistry

    (a) An ideal gas occupies a volume of 1.0 cm3 at 20°C and atmospheric pressure. Determine the number of molecules of gas in the container. i got that right to be 2.5e19 molecules (b) If the pressure of the 1.0 cm3 volume is

  4. Physics Last Question HEEEELLLPPP !

    #1 The internal energy of the gas in a gasoline engine’s cylinder decreases by 295 J. If 47.0 J of work is done by the gas, how much energy is transferred as heat? #2 If an ideal gas does work on its surroundings: a. The

  1. chem

    One mole of an ideal gas is sealed in a 22.4- container at a pressure of 1 and a temperature of 273 . The temperature is then increased to 305 , but the container does not expand. What will the new pressure be?

  2. Chem

    A sealed container holding 0.0255 L of an ideal gas at 0.989 atm and 71 °C is placed into a refrigerator and cooled to 45 °C with no change in volume. Calculate the final pressure of the gas.

  3. physics

    If an ideal gas does positive work on its surroundings, we may assume, with regard to the gas: A. Volume increases B. Internal energy decreases C. Pressure decreases D. Temperature increases E. Pressure increases

  4. chemistry

    If I contain 3 moles of gas in a container with a volume of 60 liters and at temperature of 400 K, what is the pressure inside the container? Ideal Gas Law: PV=nRT I know I'm given the volume, temperature, and numbers of moles of

  1. physics

    A container of volume 0.39 m3 contains 8.7 mol of argon gas at 32◦C. Assuming argon behaves as an ideal gas, find the total internal energy of this gas. Answer in units of J.Given: R = 8.31451 J/mol • K.

  2. Physics

    (a) An ideal gas occupies a volume of 1.6-cm3 at 20°C and atmospheric pressure. Determine the number of molecules of gas in the container. (b) If the pressure of the 1.6-cm3 volume is reduced to 1.6 10-11 Pa (an extremely good

  3. engineering

    You have an ideal gas in an insulated container. You compress it from a pressure of 40 × 105 Pa to 20 × 105 Pa, while increasing the volume from 10 to 20 m3. What is the work you done by the gas 1- 10 J 2- 300 J 3- 500 J 4- 880

  4. chemistry

    The temperature of an ideal gas in a 5.00 L container originally at 1.01 bar pressure and 25 °C is lowered to 220 K. Calculate the new pressure of the gas.

View more similar questions or ask a new question.