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 24 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
:D TYSM

raenoj

  • Member
  • Posts: 340
Reply 3 on: Yesterday
Great answer, keep it coming :)

« previous next »
 

Did you know?

Intradermal injections are somewhat difficult to correctly administer because the skin layers are so thin that it is easy to accidentally punch through to the deeper subcutaneous layer.

Did you know?

In 2012, nearly 24 milliion Americans, aged 12 and older, had abused an illicit drug, according to the National Institute on Drug Abuse (NIDA).

Did you know?

Though Candida and Aspergillus species are the most common fungal pathogens causing invasive fungal disease in the immunocompromised, infections due to previously uncommon hyaline and dematiaceous filamentous fungi are occurring more often today. Rare fungal infections, once accurately diagnosed, may require surgical debridement, immunotherapy, and newer antifungals used singly or in combination with older antifungals, on a case-by-case basis.

Did you know?

According to the CDC, approximately 31.7% of the U.S. population has high low-density lipoprotein (LDL) or "bad cholesterol" levels.

Did you know?

Thyroid conditions may make getting pregnant impossible.

Comparison of reactions at equilibrium and steady state Comparison of reactions at equilibrium and steady state
Location of point of maximum effort Location of point of maximum effort
Finger pressure to a trigger point. Finger pressure to a trigger point.
Liquid Water Properties compared with n-pentane, nonpolar, non-hydrogen bonding liquid Liquid Water Properties compared with n-pentane, nonpolar, non-hydrogen bonding liquid
Two-point discrimination Two-point discrimination
The slope of the curve y = ax^3 - bx^2 + cx - 3 at x = 2 is 5. If the point of inflection of the cur The slope of the curve y = ax^3 - bx^2 + cx - 3 at x = 2 is 5. If the point of inflection of the cur
Video: Introduction to Macular Degeneration

For a complete list of videos, visit our video library