When backpacking in the wilderness, hikers often boil water to sterilize it for drinking. Suppose that you are planning a backpacking trip and will need to boil 35 L of water for your group. What volume of fuel should you bring? Assume that the fuel has an average formula of C7H16, 15% of the heat generated from combustion goes to heat the water (the rest is lost to thesurroundings), the density of the fuel is 0.78 g/mL, the initial temperature of the water is 25.0 °C, and the standard enthalpy of formation of C7H16 is -224.4 kJ/mol.

Chemistry for Engineering Students
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Chapter9: Energy And Chemistry
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When backpacking in the wilderness, hikers often boil water to sterilize it for drinking. Suppose that you are planning a backpacking trip and will need to boil 35 L of water for your group. What volume of fuel should you bring? Assume that the fuel has an average formula of C7H16, 15% of the heat generated from combustion goes to heat the water (the rest is lost to the
surroundings), the density of the fuel is 0.78 g/mL, the initial temperature of the water is 25.0 °C, and the standard enthalpy of formation of C7H16 is -224.4 kJ/mol.

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