« previous next »

Author Question: If a given mass of a gas is maintained at a constant temperature, what will decreasing its pressure ... (Read 41 times)

beccaep

  • Hero Member
  • *****
  • Posts: 535
on: Jul 16, 2018
If a given mass of a gas is maintained at a constant temperature, what will decreasing its pressure do?
 
  a. Decrease its volume.
  b. Increase its mass.
  c. Increase its volume.
  d. Decrease its mass.

Question 2

Both a compressed gas cylinder and its regulator are at room temperature with all valves in the off position. After the cylinder is opened and gas begins flowing, you note that the regulator is extremely cold to touch.
 
  Which of the following principles best explains this observation?
  a. Adiabatic compression
  b. Gay-Lussac's law
  c. Joule-Thompson effect
  d. Venturi principle


fur

  • Sr. Member
  • ****
  • Posts: 309
Reply #1 on: Jul 16, 2018
Answer to Question 1

ANS: C
If a gas-filled container could be enlarged, the gas would expand to occupy the new volume. Figure 6-19 illustrates the concepts of gas compression and expansion.

Answer to Question 2

ANS: C
The rapid expansion of real gases causes substantial cooling. This phenomenon of expansion cooling is called the Joule-Thompson effect. Adiabatic compression can also occur in gas delivery systems where rapid compression occurs within a fixed container. The rise in temperature caused by this rapid compression can ignite any combustible material in the system. It is for this reason that RTs must take care to clear any combustible matter from high-pressure gas delivery systems before pressurization.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

When blood is deoxygenated and flowing back to the heart through the veins, it is dark reddish-blue in color. Blood in the arteries that is oxygenated and flowing out to the body is bright red. Whereas arterial blood comes out in spurts, venous blood flows.

Did you know?

In 1835 it was discovered that a disease of silkworms known as muscardine could be transferred from one silkworm to another, and was caused by a fungus.

Did you know?

Since 1988, the CDC has reported a 99% reduction in bacterial meningitis caused by Haemophilus influenzae, due to the introduction of the vaccine against it.

Did you know?

When taking monoamine oxidase inhibitors, people should avoid a variety of foods, which include alcoholic beverages, bean curd, broad (fava) bean pods, cheese, fish, ginseng, protein extracts, meat, sauerkraut, shrimp paste, soups, and yeast.

Did you know?

There can actually be a 25-hour time difference between certain locations in the world. The International Date Line passes between the islands of Samoa and American Samoa. It is not a straight line, but "zig-zags" around various island chains. Therefore, Samoa and nearby islands have one date, while American Samoa and nearby islands are one day behind. Daylight saving time is used in some islands, but not in others—further shifting the hours out of sync with natural time.

Transurethral resection of the prostate (TURP). As a treatment for BPH, part of the prostate gland i Transurethral resection of the prostate (TURP). As a treatment for BPH, part of the prostate gland i
The recent mass upheavals in Tunisia, Egypt, Libya, Yemen, and Syria gave political scientists a cha The recent mass upheavals in Tunisia, Egypt, Libya, Yemen, and Syria gave political scientists a cha
Spring force, crankcase pressure, and intake manifold vacuum work together to regulate the flow rate ... Spring force, crankcase pressure, and intake manifold vacuum work together to regulate the flow rate ...
Predicted Temperature Trends Through the 21st Century Predicted Temperature Trends Through the 21st Century
Palpating for rebound tenderness: Rapid release of pressure Palpating for rebound tenderness: Rapid release of pressure
What mass, in grams, of a 5.00% by mass sugar water solution is needed to supply What mass, in grams, of a 5.00% by mass sugar water solution is needed to supply
Video: Phlebotomy

For a complete list of videos, visit our video library