For certain molecules, enthalpies of formation can be

Chapter 16, Problem 16.1.67

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For certain molecules, enthalpies of formation can be determined from combustion data. Using the diagram below, calculate the enthalpy of formation (H), of methane gas CH4(g), and the enthalpies for two of the combustion reactions listed below. C(s) + O2(g) CO2(g) H = -394 kJ H2(g) + _1 2 O2(g) H2O(l) H = ? CH4(g) + 2O2(g) CO2(g) + 2H2O(l) H = ?

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