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Author Question: A 0.42-kg quantity of ethanol, in the liquid state at its melting point of -114.4C, is frozen at ... (Read 15 times)

swpotter12

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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.


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allisonblackmore

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Reply #1 on: Jul 29, 2018
Answer to Question 1

B

Answer to Question 2

A


swpotter12

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Reply 2 on: Jul 29, 2018
Excellent

xiazhe

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Reply 3 on: Yesterday
Gracias!

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