13. A combustion reaction is described as a carbon source reacting with oxygen and producing carbon dioxide and water. A common example of this reaction is methane reacting with oxygen gas in the following reaction:
CH4(g) + 2O2(g) → CO2(g) + 2H2O(g)
What would the standard entropy change be, if 20.0 g of methane reacted with 20.0 g of oxygen?