This topic contains a solution. Click here to go to the answer

Author Question: Which answer below is not a statement of the second law of thermodynamics? a. Real processes ... (Read 31 times)

rl

  • Hero Member
  • *****
  • Posts: 579
Which answer below is not a statement of the second law of thermodynamics?
 a. Real processes proceed in a preferred direction.
  b. Energy does not flow spontaneously by heat from a cold to a hot reservoir.
  c. The entropy of the universe increases in all natural processes.
  d. In theory, heat engines working in a cycle employ reversible processes.
  e. You cannot construct a heat engine, operating in a cycle that does nothing but take heat from a reservoir and perform an equal amount of work.

Question 2

An engine is designed to obtain energy from the temperature gradient of the ocean. What is the thermodynamic efficiency of such an engine if the temperature of the surface of the water is 59F (15C) and the temperature well below the surface is 41F (5C)?
 a. 3.5
  b. 67
  c. 31
  d. 17
  e. 96



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

Joc

  • Sr. Member
  • ****
  • Posts: 317
Answer to Question 1

D

Answer to Question 2

A




rl

  • Member
  • Posts: 579
Reply 2 on: Jul 28, 2018
Gracias!


ghepp

  • Member
  • Posts: 361
Reply 3 on: Yesterday
:D TYSM

 

Did you know?

In 2010, opiate painkllers, such as morphine, OxyContin®, and Vicodin®, were tied to almost 60% of drug overdose deaths.

Did you know?

Tobacco depletes the body of vitamins A, C, and E, which can result in any of the following: dry hair, dry skin, dry eyes, poor growth, night blindness, abscesses, insomnia, fatigue, reproductive system problems, sinusitis, pneumonia, frequent respiratory problems, skin disorders, weight loss, rickets, osteomalacia, nervousness, muscle spasms, leg cramps, extremity numbness, bone malformations, decayed teeth, difficulty in walking, irritability, restlessness, profuse sweating, increased uric acid (gout), joint damage, damaged red blood cells, destruction of nerves, infertility, miscarriage, and many types of cancer.

Did you know?

Ether was used widely for surgeries but became less popular because of its flammability and its tendency to cause vomiting. In England, it was quickly replaced by chloroform, but this agent caused many deaths and lost popularity.

Did you know?

Chronic necrotizing aspergillosis has a slowly progressive process that, unlike invasive aspergillosis, does not spread to other organ systems or the blood vessels. It most often affects middle-aged and elderly individuals, spreading to surrounding tissue in the lungs. The disease often does not respond to conventionally successful treatments, and requires individualized therapies in order to keep it from becoming life-threatening.

Did you know?

Patients who have undergone chemotherapy for the treatment of cancer often complain of a lack of mental focus; memory loss; and a general diminution in abilities such as multitasking, attention span, and general mental agility.

For a complete list of videos, visit our video library