NOVELTY - A portion of coal formation is heated using heat source(s) (801). The heat is then transferred from heat source(s) to a selected section of formation. The heat from heat source(s) is controlled such that average temperature within majority of selected section of formation is less than 375degreesC. Finally, a mixture is produced from the formation.    USE - For heating coal formation including humic and/or sapropelic coal used for production of hydrocarbons, hydrogen and/or other products from coal formation. For production of synthesis gas used in the production of other products such as diesel, jet fuel, naphtha products, methane by catalytic methylation process, methanol, gasoline and diesel fuel, ammonia (for fertilizers) and middle distillates. For synthesizing a wide range of organic and/or inorganic compounds such as hydrocarbons and ammonia. For generating electricity by combusting it as a fuel, by reducing the pressure of synthesis gas in turbines and/or using the temperature of synthesis gas to make steam. For energy generation unit such as molten carbonate fuel cell, solid oxide fuel cell or other type of fuel cell. Carbon dioxide in synthesis gas produced from coal formation, is used for synthesis gas production and/or coal bed methane production.    ADVANTAGE - The coal formations are treated to yield relatively high quality hydrocarbon products, hydrogen, and other products. Cooling of formation increases the strength of rock in the formation (thereby mitigating subsidence) and increases absorptive capacity of the formation. The in situ treatment of coal formation increases transfer of vapors through the treated portion of the formation. Therefore, a number of production wells required to produce a mixture from the formation may be reduced, thereby increasing economic viability of in situ conversion process. High temperature pumping of liquids from the production well is reduced or eliminated, which decreases production cost. Heating the production well prevents condensation and/or refluxing of production fluid, increases heat input into formation and increases formation permeability at or proximate the production well. By maintaining increased pressure within the formation facilitates production of formation fluids, facilitates generation of electricity from produced non-condensable fluid, and reduces or eliminates the need to compress formation fluid at a surface because the formation products are produced at higher pressure.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for the following:    (1) In situ method for heating coal formation;    (2) In situ method for producing hydrogen from coal formation;    (3) Method for forming heater wells in coal formation;    (4) System configured to heat coal formation;    (5) Mixture produced from a portion of coal formation;    (6) In situ production of synthesis gas from coal formation;    (7) Method of forming a spent portion of formation within coal formation;    (8) Method of sequestering carbon dioxide within coal formation;    (9) In situ production of energy from coal formation;    (10) Production of ammonia using coal formation;    (11) Treatment of hydrocarbons in at least a portion of coal formation.    DESCRIPTION OF DRAWING(S) - The figure shows the generation of synthesis gas formation using pyrolysis water.    Heat source(s) (801)    Production well (825)