The higher heating value (HHV) of a fuel is its standard heat of combustion at 25°C with liquid water as a product; the lower heating value (LHV) is for water vapor as product.

(a) Explain the origins of these terms.

(b) Determine the HHV and the LHV for natural gas, modeled as pure methane.

(c) Determine the HHV and the LHV for a home-heating oil, modeled as pure liquid n-decane. For n-decane as a liquid ΔH ^o _{f 298} = –249.700 J 1 mol ^–1 .

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a When the water formed as the result of combustion is conde... View the full answer