Pumper and squeezing the rubber septum as indicated

Assignment Help Chemistry
Reference no: EM13126505

1. Place one large marshmallow in the vacuum chamber.
2. Cover the chamber with the dome and insert the pumper into the rubber septum.
3. Raise and lower the pumper slowly and observe what happens to the marshmallow.
4. The more times you pump, the more air is drawn out of the chamber.
5. After you have made your observations, you can release the vacuum and allow the pressure inside to return to atmospheric pressure. Do this by removing the pumper and squeezing the rubber septum as indicated.
6. Observe what happens to the marshmallow when the vacuum is released.
7. Remove the marshmallow.

Now try it with a balloon
1. Inflate the balloon to about an inch or two and tie a knot in it. It must fit in the chamber with room to spare so do not inflate it too much.
2. Place the small, inflated balloon in the chamber. Repeat steps 2 through 7.

The marshmallow has a large amount of air trapped in the pores of its carbohydrate structure. As the air is drawn out of the vacuum chamber, the pressure outside the marshmallow is reduced. The pressure of the air inside the marshmallow causes the air inside to expand. Thus you should have observed a change in the size of the marshmallow. A similar phenomenon occurs when the small, inflated balloon is placed in the chamber. As the air is removed from the chamber and the pressure is reduced on the outside walls of the balloon, the air pressure inside the balloon is greater than outside. It pushes the rubber walls of the balloon outward. You should observed a change in the size of the balloon.

In both experiments with the marshmallow and the balloon, once the vacuum was released, the air pressure inside the chamber increased back to atmospheric pressure.

Questions
1. Why does the air inside the marshmallow or balloon fill a larger volume when some of the air outside them is removed?
2. Why does the balloon return to its original size when the vacuum is released?
3. Can you explain this phenomenon in terms of the kinetic molecular theory of gases?
4. What gas law is being demonstrated by this expanding volume of gas as the pressure is being reduced?

Reference no: EM13126505

Questions Cloud

What is the molarity of the strontium ion : The average concentration of strontium ion in seawater is 8.00 mg of strontium ion per kg of seawater. What is the molarity of the strontium ion if the density of the seawater is 1.025 g/mL.
Prime ideals-maximal ideals : Prove that if M is a maximal ideal of S and phi is surjective then phi^-1(M) is maximal ideal of R. Give an example to show that this need not be the case if phi is not surjective.
Determine the ending oaa balance : If the beginning balance in OAA is $3,900, and the following transactions occur, what is the ending OAA balance?
Explain how can the concept of batch-level activities : Explain how can the concept of batch-level activities be applied to an airline? What are two examples of batch-level activities for JetBlue? What steps has JetBlue taken to manage these batch-level activities more efficiently?
Pumper and squeezing the rubber septum as indicated : After you have made your observations, you can release the vacuum and allow the pressure inside to return to atmospheric pressure. Do this by removing the pumper and squeezing the rubber septum as indicated.
What do results say about testing with group data : What do these results say about testing with group data? Include in your answer the URLs of the sites where you found the necessary data.
Laurent series and power series : If F is a field, prove that the field of fractions of F[[x]] is the ring F((x)) of formal Laurent series. Show that the field of fractions of the power series ring Z[[x]] is properly contained in the field of Laurent series Q((x)).
Explain how using the format account name/debit : Explain how using the format account name/debit or credit/dollar amount and (2) explain how the Accounting Equation is impacted.
Explain is body temperature of f unusual : Assume the body temperatures of healthy adults are normally distributed with a mean of 98.20 °F and a standard deviation of 0.62 °F. Is body temperature of 99.00 °F unusual? Why or why not?

Reviews

Write a Review

 

Chemistry Questions & Answers

  Use information to compare how long it will take molecular

Use this information to compare how long it will take to obtain molecular scale mixing of such a gas over i) distance 1*10^-4 m and ii) 10m

  Why there is a difference bw expected and actual values

What are some reasons why there would be a difference between the expected and actual values for the moles of copper oxide produced from heating copper in the air.

  Compute the final temperature of the mixture

Compute the final temperature of the mixture (assuming no heat loss to the surroundings). The heat capacities of H2O(s) and H2O (l) are 2.08 and 4.18 J/g · °C, respectively, enthalpy of fusion for ice = 6.02 kJ/mol.

  Compute the ka for the acid

Compute the Ka for the acid if the pH of the resulting solution = 6.36. and determine the pH of the resulting buffer

  Problem related to half life and radioactive decay

The half-life of Plutonium-239 is 24,000 years. If 10 gms are present now, how long will it take until only 10% of the original sample remains? Round your answer to the nearest 10,000th.

  How many gram of baso4 are formed

500cm3 of 0.250M of Na2SO4 is added to an aqueous solution of 15.0g of BaCl2 resulting in a white precipitate of insoluble BaSO4.

  What temperature , in celsius, is needed

Using the same sample of gas ( = 275 , = 43 ), we wish to change the pressure to 2750 with no accompanying change in volume or amount of gas.

  How many meters away is a cliff

how many meters away is a cliff if an echo is heard one half second away? assume that sound ws traveled at 343 m/s on that day.

  What is the rate constant for the reaction

NO (g) + O3 (g)-> NO2 (g) + O2 (g) For the reaction given, the frequency factor A is 8.7 x 1012 s-1 and the activation energy is 63 kJ/mol. What is the rate constant for the reaction at 75°C.

  Calculate the molarity of the hci solution

The Standardized solution of NaOH is used to titrate a solution of HCI. Write the balanced equation for this reaction. Calculate the molarity of the HCl solution.

  Calculate the pressure of oxygen

A steel tank has a volume of 438 L and is filled with 0.885 kg of oxygen. calculate the pressure of oxygen at 69.8 fahrenheit.

  Determine the numerical value of k

It is found for the reaction A + B > C that doubling the concentration of either A or B while keeping the other one constant quadruples the reaction rate. Write a rate law for the reaction

Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd