Calculate the Internal Energy Change, Δ_rU, for the Combustion of 9.467

question 53

Multiple Choice

Calculate the internal energy change, Δ_rU, for the combustion of 9.467 g of L-alanine (C₃H₇NO₂, molar mass = 89.094 g mol^-1) if the combustion inside a bomb calorimeter, C_cal = 7.83 kJ °C^-1, causes a temperature change from 24.7 °C to 46.1 °C.

• A) -1.58 × 10³ kJ mol^-1
• B) 6.14 × 10³ kJ mol^-1
• C) -3.48 × 10³ kJ mol^-1
• D) -8.60 × 10² kJ mol^-1
• E) 3.84 × 10³ kJ mol^-1

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