This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: A gasoline engine absorbs 2500 J of heat at 250C and expels 2000 J at a temperature of 50C. What is ... (Read 76 times)

luvbio

  • Hero Member
  • *****
  • Posts: 623
on: Jul 28, 2018
A gasoline engine absorbs 2500 J of heat at 250C and expels 2000 J at a temperature of 50C. What is the magnitude of the change in entropy (in J/K) for the system?
 a. 6.2
  b. 4.7
  c. 1.4
  d. 10.9
  e. 3.2

Question 2

A vessel containing 10 kg of water is left out where it evaporates. If the temperature remains constant at 20C, what is the change in entropy (in kcal/K)? (The latent heat of vaporization at 20C is 585 cal/g.)
 a. 30
  b. 10
  c. 20
  d. 40
  e. 290


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

trog

  • Sr. Member
  • ****
  • Posts: 343
Reply #1 on: Jul 28, 2018
Answer to Question 1

c

Answer to Question 2

c


luvbio

  • Member
  • Posts: 623
Reply 2 on: Jul 28, 2018
Wow, this really help

bdobbins

  • Member
  • Posts: 326
Reply 3 on: Yesterday
Gracias!

« previous next »
 

Did you know?

Prostaglandins were first isolated from human semen in Sweden in the 1930s. They were so named because the researcher thought that they came from the prostate gland. In fact, prostaglandins exist and are synthesized in almost every cell of the body.

Did you know?

Cocaine was isolated in 1860 and first used as a local anesthetic in 1884. Its first clinical use was by Sigmund Freud to wean a patient from morphine addiction. The fictional character Sherlock Holmes was supposed to be addicted to cocaine by injection.

Did you know?

Over time, chronic hepatitis B virus and hepatitis C virus infections can progress to advanced liver disease, liver failure, and hepatocellular carcinoma. Unlike other forms, more than 80% of hepatitis C infections become chronic and lead to liver disease. When combined with hepatitis B, hepatitis C now accounts for 75% percent of all cases of liver disease around the world. Liver failure caused by hepatitis C is now leading cause of liver transplants in the United States.

Did you know?

The most destructive flu epidemic of all times in recorded history occurred in 1918, with approximately 20 million deaths worldwide.

Did you know?

There are more nerve cells in one human brain than there are stars in the Milky Way.

Body temperature and environmental temperature in homeotherms versus heterotherms. Body temperature and environmental temperature in homeotherms versus heterotherms.
Countercurrent heat exchange in the lateral muscles of bluefin tuna. Countercurrent heat exchange in the lateral muscles of bluefin tuna.
A throttle-body injection (TBI) unit used on a GM V-6 engine. A throttle-body injection (TBI) unit used on a GM V-6 engine.
A turbocharged Ford three-cylinder 1.0 liter Eco Boost engine. A turbocharged Ford three-cylinder 1.0 liter Eco Boost engine.
A rapidly vibrating needle at idle that becomes steady as engine speed is increased indicates worn ... A rapidly vibrating needle at idle that becomes steady as engine speed is increased indicates worn ...
You deposit $2000 each year into an account earning 4% interest compounded annually. How much ... You deposit $2000 each year into an account earning 4% interest compounded annually. How much ...
Video: Neurotransmission at chemical synapses & Excitory and inhibitory potentials

For a complete list of videos, visit our video library