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A gaseous fuel mixture stored at 744 mm Hg and 298 K contains only methane (CH4)...

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Chemistry

A gaseous fuel mixture stored at 744 mm Hg and 298 Kcontains only methane (CH4) and propane (C3H8). When 13.1 L of thisfuel mixture is burned, it produces 858 kJ of heat. What is themole fraction of methane in the mixture? (Assume that the waterproduced by the combustion is in the gaseous state.)

Answer & Explanation Solved by verified expert
4.4 Ratings (858 Votes)
Step 1 Use PVnRT to find total number of moles of the gas mixture Be sure to use the proper units for R Step 2 Find the heats of reaction for methane and propane by looking up the heats of formation of reactants and products using the balanced equations Step 3 Let the moles of methane be X and the moles of propane be total molesX Step    See Answer
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