which process is spontaneous
When Î´S is negative and Î´H is negative, the relative magnitudes of Î´S and Î´H determine if the reaction is spontaneous. Low temperatures make the reaction more favorable. When Î´S is negative and Î´H is positive, a process is not spontaneous at any temperature, but the reverse process is spontaneous.A spontaneous process is the time-evolution of a system in which it releases free energy (usually as heat) and moves to a lower, more thermodynamically stable energy state.hen Î´ S is positive and Î´ H is negative, a process is always spontaneous. When Î´ S is positive and Î´ H is positive, the relative magnitudes of Î´ S and Î´ H determine if the reaction is spontaneous. High temperatures make the reaction more favorable.