Multiple choice

Which one of the following is true for the flow of water from level to low level (at constant temperature an pressure)?

  1. ∆ G = 0

  2. ∆ G = 1

  3. ∆ G < 0

  4. ∆ G = ∞
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

In thermodynamics, a spontaneous process (like water flowing from a high level to a low level) occurs when there is a decrease in the Gibbs Free Energy of the system. Therefore, for such a process at constant temperature and pressure, the change in Gibbs Free Energy (delta G) must be less than zero (negative). If delta G were zero, the system would be at equilibrium.

Keep practicing — related questions