What is an energy regime?

What the heck is free energy, entropy, spontaneous process, etc. in easy to understand language.?

• What is free energy? Is it simply the amount of energy that can be used? And if so, since free energy is G, when ΔG decreases, does that mean energy is being released or used? In other words, is that energy being used for like, motion? If it does, does that mean the more spontaneous process there are, the more energy there is that can be used? and if ΔG increases, does that mean there is less spontaneous energy making there less energy or free energy used so in a sense storing free energy? AND is entropy = spontaneous process? AND what exactly is spontaneous process?

• Answer:

  Basicly (or naturally) every process may occur if at least there is decrease of energy or increase of entropy. For chemical reaction, this define by gibb's free energy, ΔG = ΔH - TΔS Process will occur if ΔG < 0, it means the process is spontaneous Let's evaluate each term, Energy change, ΔG = ΔH < 0, this allowed if enthalpy change, ΔH< 0, or decrease of energy. Entropy change, ΔG = -TΔS < 0, this allowed if entropy change, ΔS> 0, or increase of entropy. Combine both term. ΔG = ΔH - TΔS < 0 Process always spontaneous if energy is decreasing and entropy is increasing.