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October 31, 2014

Homework Help: Chemistry

Posted by LaurenB on Friday, December 2, 2011 at 4:03pm.

Calculate the volume of natural gas (methane) required to bring 3.9 L of water to a boil. Assume the initial temperature of the water is 39 C, and the methane is at 1 bar and 25 C. Assume that methane is an ideal gas, the specific heat capacity of water to be constant and equal to 4.184 J/g/K over this temperature range, and the density of water to be 1.0 g/cm3. The combustion of methane is given by

CH4 + 2 O2 → CO2 + 2 H2O ΔHcomb = -890.36 kJ/mol.

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