Question

Which of the following processes is spontaneous?

A). building a house


B). launching a satellite into orbit

C). drops of dye dispersing in a clear solution


D). cleaning your bedroom


E). a ball rolling up a hill

Answer 1

C

It is the only answer that does not require outside energy.

Answer 2

The correct answer for above statement is:

C). drops of dye dispersing in a clear solution

Explanation:

A spontaneous manner is the time-evolution of a system in which it liberates free energy and it influences to a lower, more thermodynamically steady energy state. The symbol convention for free energy follows the usual convention for thermodynamic measurements, in which a statement of free energy from the system compares to an adverse change in the free energy of the system and a positive change in the free power of the surroundings.