A 0.42-kg quantity of ethanol, in the liquid state at its melting point of -114.4°C, 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
B
You might also like to view...
Process of Science: In order for us to understand how the solar system got to be that way it is, we must identify the major solar system patterns that our formation theory must explain
Name 3 patterns of motion or planetary arrangement/location that our theory should be able to explain.
A particle (mass = 6.7 × 10^?27 kg, charge = 3.2 × 10^?19 C) moves along the positive x axis with a speed of 4.8 × 10^5 m/s. It enters a region of uniform electric field parallel to its motion and comes to rest after moving 2.0 m into the field. What is the magnitude of the electric field?
a. 2.0 kN/C b. 1.5 kN/C c. 1.2 kN/C d. 3.5 kN/C e. 2.4 kN/C
General Questions: A person who normally weighs 700 N is riding in a rather swift elevator that is moving at a constant speed of 9.8 m/s. If this person is standing on a bathroom scale inside the elevator, what would the scale read?
A. more than 700 N B. less than 700 N C. 700 N D. It could be more or less than 700 N, depending on whether the elevator is going up or down.
The _____ is a geologically brief period about 540 million years ago during which fossil evidence indicates Earth life became complex and diverse
A) Cambrian explosion B) Paleozoic era C) Renaissance D) Ordovician