Two systems are said to be in chemical equilibrium with each other when their chemical potentials are same. 3) Thermal equilibrium: When the system is in mechanical and chemical equilibrium and there is no spontaneous change in any of its properties, the system is said to be in thermal equilibrium.
While scientists have known for some time that genetics play a role in alcoholism and other addictions, they also understand the tendency to be dependent on alcohol is more complicated than the simple presence or absence of any one gene.
Myth No. 1: There is an addiction gene. There is no single gene, or set of genes, that determines whether or not a person will become an addict. And even if a person's parents are addicts, it doesn't mean they will be too. Current addiction research shows that roughly 50% of addiction tendencies are attributable to genes.