Author Question: A 0.42-kg quantity of ethanol, in the liquid state at its melting point of -114.4C, is frozen at ... (Read 23 times)

swpotter12 · **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.