« previous next »

Author Question: What is the change in entropy when 15.0 g of water at 100C are turned into steam at 100C? The latent ... (Read 59 times)

Cooldude101

  • Hero Member
  • *****
  • Posts: 557
on: Jul 29, 2018
What is the change in entropy when 15.0 g of water at 100C are turned into steam at 100C? The latent heat of vaporization of water is 22.6  105 J/kg.
 
  A) 90.8 J/K
  B) -90.8 J/K
  C) 339 J/K
  D) -339 J/K
  E) 0 J/K

Question 2

A thermodynamic pump absorbs thermal energy from the atmosphere at a rate of 30 kW. If work is being done to run this thermodynamic pump at a rate of 7.7 kW, what is the coefficient of performance (COP) of the thermodynamic pump?
 
  A) 3.9
  B) 4.9
  C) 2.9
  D) 0.26
  E) 22


abro1885

  • Sr. Member
  • ****
  • Posts: 337
Reply #1 on: Jul 29, 2018
Answer to Question 1

A

Answer to Question 2

B


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

According to the FDA, adverse drug events harmed or killed approximately 1,200,000 people in the United States in the year 2015.

Did you know?

There are more bacteria in your mouth than there are people in the world.

Did you know?

Although the Roman numeral for the number 4 has always been taught to have been "IV," according to historians, the ancient Romans probably used "IIII" most of the time. This is partially backed up by the fact that early grandfather clocks displayed IIII for the number 4 instead of IV. Early clockmakers apparently thought that the IIII balanced out the VIII (used for the number 8) on the clock face and that it just looked better.

Did you know?

The first documented use of surgical anesthesia in the United States was in Connecticut in 1844.

Did you know?

Acute bronchitis is an inflammation of the breathing tubes (bronchi), which causes increased mucus production and other changes. It is usually caused by bacteria or viruses, can be serious in people who have pulmonary or cardiac diseases, and can lead to pneumonia.

Ripples in Water Ripples in Water
Water breaks (Or Water rupture) "نزول ماء الجنين او ميه الراس" Water breaks (Or Water rupture) "نزول ماء الجنين او ميه الراس"
Ocean water flows vertically and horizontally, influencing climate Ocean water flows vertically and horizontally, influencing climate
Greenhouse gas (GHG) and Water vapor (H2O) Greenhouse gas (GHG) and Water vapor (H2O)
Video: Conjunctivitis

For a complete list of videos, visit our video library