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Calculate the Internal Energy Change, ΔrU, for the Combustion of 29.3

Question 62

Multiple Choice

Calculate the internal energy change, ΔrU, for the combustion of 29.3 g of vitamin C (C6H8O6, molar mass = 176.124 g mol-1) if the combustion inside a bomb calorimeter, Ccal = 8.31 kJ °C-1, causes a temperature change from 21.5 °C to 68.3 °C.


A) -1.78 × 103 kJ mol-1
B) -2.34 × 103 kJ mol-1
C) -6.03 × 103 kJ mol-1
D) -9.19 × 102 kJ mol-1
E) -1.67 × 102 kJ mol-1

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