Summary Spontaneous process: processes proceed in a certain direction initial condition of the system can be restored,but not in a spontaneous process.Some auxiliary devices would be required (a permanent change in the condition of the surroundings would result.) satisfying the first law does not ensure that the process can actually occur 上游充通大学 Mar/29,Wed,2017 6 SHANGHAI JLAO TONG UNIVERSITYMar/29, Wed, 2017 6 Summary Spontaneous process: • processes proceed in a certain direction • initial condition of the system can be restored, but not in a spontaneous process. Some auxiliary devices would be required (a permanent change in the condition of the surroundings would result.). • satisfying the first law does not ensure that the process can actually occur