(Answered) The combustion of naphthalene c10h8 which releases 51501

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The combustion of naphthalene (C₁₀H₈), which releases 5150.1 kJ/mol, is often used to calibrate calorimeters. A 1.05 - g sample of naphthalene is burned in a calorimeter, producting a temperature rise of 3.86 degrees Celsius. Burning a 1.83 - g sample of coal in the same calorimeter causes a temperature change of 4.90 degrees Celsius. What is the energy density of the coal?

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