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

Author Question: Substance A has twice the heat capacity of substance B. If equal masses of both substances are ... (Read 72 times)

melina_rosy

  • Hero Member
  • *****
  • Posts: 531
Substance A has twice the heat capacity of substance B. If equal masses of both substances are raised 10 C and substance A gains 30 kJ of energy, substance B gains 15 kJ of energy.
 
  What will be an ideal response?

Question 2

All forms of energy are equivalent in terms of doing useful work.
 
  What will be an ideal response?



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

flexer1n1

  • Sr. Member
  • ****
  • Posts: 373
Answer to Question 1

The amount of heat transferred is DQ = (heat capacity)DT. Given that the
temperatures rise the same amount, the substance with the greater heat capacity will transfer
the greater amount of heat. Therefore, the statement is correct.

Answer to Question 2

This is not true. We have seen that the quality of the energy is not the same.
Electrical energy can all be converted to useful work, but thermal energy cannot. We have
seen that thermal engines operate between temperature reservoirs and that thermal energy is
taken from the high temperature reservoir, work is done, and thermal energy is exhausted to
the low temperature reservoir. The energy rejected to the low temperature reservoir cannot
be used to do work.




melina_rosy

  • Member
  • Posts: 531
Reply 2 on: Jul 28, 2018
:D TYSM


meganmoser117

  • Member
  • Posts: 303
Reply 3 on: Yesterday
Thanks for the timely response, appreciate it

 

Did you know?

GI conditions that will keep you out of the U.S. armed services include ulcers, varices, fistulas, esophagitis, gastritis, congenital abnormalities, inflammatory bowel disease, enteritis, colitis, proctitis, duodenal diverticula, malabsorption syndromes, hepatitis, cirrhosis, cysts, abscesses, pancreatitis, polyps, certain hemorrhoids, splenomegaly, hernias, recent abdominal surgery, GI bypass or stomach stapling, and artificial GI openings.

Did you know?

The largest baby ever born weighed more than 23 pounds but died just 11 hours after his birth in 1879. The largest surviving baby was born in October 2009 in Sumatra, Indonesia, and weighed an astounding 19.2 pounds at birth.

Did you know?

Aspirin may benefit 11 different cancers, including those of the colon, pancreas, lungs, prostate, breasts, and leukemia.

Did you know?

No drugs are available to relieve parathyroid disease. Parathyroid disease is caused by a parathyroid tumor, and it needs to be removed by surgery.

Did you know?

The U.S. Preventive Services Task Force recommends that all women age 65 years of age or older should be screened with bone densitometry.

For a complete list of videos, visit our video library