Whenever organic matter is decomposed under oxygen-free (anaerobic) conditions, methane

Chapter 6, Problem 6.94

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Whenever organic matter is decomposed under oxygen-free (anaerobic) conditions, methane is one of the products. Thus, enormous deposits of natural gas, which is almost entirely methane, serve as a major source of fuel for home and industry. (a) Known sources of natural gas can produce 5600 EJ of energy (1 EJ _ 1018 J). Current total global energy usage is 4.0 102 EJ per year. Find the mass (in kg) of known sources of natural gas (_H_rxn for the combustion of CH4__802 kJ/mol). (b) For how many years could these sources supply the worlds total energy needs? (c) What volume (in ft3) of natural gas, measured at STP, is required to heat 1.00 qt of water from 25.0_C to 100.0_C (d of H2O _ 1.00 g/mL; d of CH4 at STP _ 0.72 g/L)? (d) The fission of 1 mol of uranium (about 4 10_4 ft3) in a nuclear reactor produces 2 1013 J. What volume (in ft3) of natural gas would produce the same amount of energy? H _ 394.1 kJ 2ClF3(l) _2O2(g)Cl2O(g) _3OF2(g) 2F2(g) _O2(g)2OF2(g) H _ _43.5 kJ 2ClF(g)_O2(g)Cl2O(g)_OF2(g) H _ 167.5 kJ A B C D 27.15C 35.59C 28.96C 30.29C