Natural gas (NG) is stored in the subsurface at 60 C and 30 bar. During storage, the NG is in contact with water and is assumed to equilibrate. During the cold season, NG saturated with water is extracted from the subsurface and pumped to a pipeline that operates at 25 C and 40 bar. Before entering the pipeline, the stream passes through a separator unit to remove any liquid water. From the data given below, estimate the amounts of water that must be removed from the stream in moles of water (2) per moles of NG (1).

T [ C]	Psat,2 [bar]	B11 [cc/mol]	B22 [cc/mol]	B12 [cc/mol]
25	0.032	-43	-1162	-62
60	0.199	-31	-790	-48