Question

Given the following values for the changes in enthalpy (delta h) an entropy (delta s), which of the following processes can take place at 298k without violating the second law of thermodynamics (note, one answer may be correct, none may be correct, or some combination there within).

Answer 1

A process can be deemed spontaneous at 298K if the Gibbs free energy change (ΔG), calculated using the enthalpy (ΔH) and entropy (ΔS) changes at that temperature, is negative.

Step-by-step explanation:

The second law of thermodynamics states that a spontaneous process increases the entropy of the universe (Suniv > 0). To determine whether a process can occur spontaneously, we need to consider both the change in enthalpy (ΔH) and the change in entropy (ΔS) of the process, as well as the temperature at which the process takes place. Spontaneity can be predicted using the Gibbs free energy change (ΔG), which is given by the equation ΔG = ΔH - TΔS. If ΔG is negative, the process is spontaneous. At a constant temperature of 298 K, which is approximately 25°C, this equation becomes particularly useful for determining spontaneity.