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

Author Question: A 0.42-kg quantity of ethanol, in the liquid state at its melting point of -114.4C, is frozen at ... (Read 50 times)

swpotter12

  • Hero Member
  • *****
  • Posts: 527
on: Jul 29, 2018
A 0.42-kg quantity of ethanol, in the liquid state at its melting point of -114.4C, is frozen at atmospheric pressure. The heat of fusion of ethanol is 1.04  105 J/kg, and its molecular mass is 46.1 g/mol.
 
  What is the change in the entropy of the ethanol as it freezes?
  A) 280 J/K B) -280 J/K C) -310 J/K D) 250 J/K E) -250 J/K

Question 2

The atomic number of an atom is equal to the number of what particles in the nucleus?
 
  A) protons
  B) neutrons
  C) nucleons
  D) electrons
  E) positrons.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

allisonblackmore

  • Sr. Member
  • ****
  • Posts: 330
Reply #1 on: Jul 29, 2018
Answer to Question 1

B

Answer to Question 2

A


swpotter12

  • Member
  • Posts: 527
Reply 2 on: Jul 29, 2018
Thanks for the timely response, appreciate it

bimper21

  • Member
  • Posts: 309
Reply 3 on: Yesterday
Gracias!

« previous next »
 

Did you know?

The first-known contraceptive was crocodile dung, used in Egypt in 2000 BC. Condoms were also reportedly used, made of animal bladders or intestines.

Did you know?

After a vasectomy, it takes about 12 ejaculations to clear out sperm that were already beyond the blocked area.

Did you know?

There are major differences in the metabolism of morphine and the illegal drug heroin. Morphine mostly produces its CNS effects through m-receptors, and at k- and d-receptors. Heroin has a slight affinity for opiate receptors. Most of its actions are due to metabolism to active metabolites (6-acetylmorphine, morphine, and morphine-6-glucuronide).

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?

All adverse reactions are commonly charted in red ink in the patient's record and usually are noted on the front of the chart. Failure to follow correct documentation procedures may result in malpractice lawsuits.

Testing Infant’s Understanding of Quantity Testing Infant’s Understanding of Quantity
How Urban Is Your State? The Rural-Urban Makeup of the United States How Urban Is Your State? The Rural-Urban Makeup of the United States
Radiation Quantity and Quality Radiation Quantity and Quality
How to find the point of intersection of two straight lines by graphing How to find the point of intersection of two straight lines by graphing
DOT placarding requirements: Table 1 materials must be placarded in any quantity, and Table 2 ... DOT placarding requirements: Table 1 materials must be placarded in any quantity, and Table 2 ...
What is the volume of 19.6 g of a liquid that has a density of 0.967 g/mL? What is the volume of 19.6 g of a liquid that has a density of 0.967 g/mL?
Video: Introduction to Pre-eclampsia

For a complete list of videos, visit our video library