« previous next »

Author Question: A gasoline engine absorbs 2 500 J of heat at 250C and expels 2 000 J at a temperature of 50C. The ... (Read 128 times)

Brittanyd9008

  • Hero Member
  • *****
  • Posts: 500
on: Jul 28, 2018
A gasoline engine absorbs 2 500 J of heat at 250C and expels 2 000 J at a temperature of 50C. The magnitude of the change in entropy (in J/K) for the system is
 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


fauacakatahaias

  • Sr. Member
  • ****
  • Posts: 353
Reply #1 on: Jul 28, 2018
Answer to Question 1

C

Answer to Question 2

C


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

Vaccines prevent between 2.5 and 4 million deaths every year.

Did you know?

The liver is the only organ that has the ability to regenerate itself after certain types of damage. As much as 25% of the liver can be removed, and it will still regenerate back to its original shape and size. However, the liver cannot regenerate after severe damage caused by alcohol.

Did you know?

One way to reduce acid reflux is to lose two or three pounds. Most people lose weight in the belly area first when they increase exercise, meaning that heartburn can be reduced quickly by this method.

Did you know?

According to the Migraine Research Foundation, migraines are the third most prevalent illness in the world. Women are most affected (18%), followed by children of both sexes (10%), and men (6%).

Did you know?

Though newer “smart” infusion pumps are increasingly becoming more sophisticated, they cannot prevent all programming and administration errors. Health care professionals that use smart infusion pumps must still practice the rights of medication administration and have other professionals double-check all high-risk infusions.

A rod/piston assembly from a 5.9 liter Cummins diesel engine used in a Dodge pickup truck. A rod/piston assembly from a 5.9 liter Cummins diesel engine used in a Dodge pickup truck.
If the needle drops 1 or 2 inches Hg from the normal reading, one of the engine valves is burned or ... If the needle drops 1 or 2 inches Hg from the normal reading, one of the engine valves is burned or ...
A needle that drops to near zero when the engine is accelerated rapidly and then rises slightly to ... A needle that drops to near zero when the engine is accelerated rapidly and then rises slightly to ...
A fuel-pressure reading does not confirm that there is enough fuel volume for the engine to ... A fuel-pressure reading does not confirm that there is enough fuel volume for the engine to ...
Air flows through the PCV valve during acceleration and when the engine is under a heavy load. Air flows through the PCV valve during acceleration and when the engine is under a heavy load.
Thick-walled barrel-shaped arthrospores on thin glass like hyphae; the room-temperature form of ... Thick-walled barrel-shaped arthrospores on thin glass like hyphae; the room-temperature form of ...
Video: Exercise and cardiac output

For a complete list of videos, visit our video library