Question

The Enthalpy of combustion of 1.0 mole of a reactive metal X at \( 27^\circ C \) and 1.0 bar pressure to form a solid oxide (XO) is -601.83 kJ/mol. The internal energy change for this reaction is --------- kJ. \[ R = 8.314 \, \text{J K}^{-1} \text{mol}^{-1} \]

• A. 701.33
• B. 754.58
• C. -614.30
• D. -600.58

Hint:

For combustion reactions under constant pressure, the change in enthalpy is often nearly equal to the change in internal energy. This approximation holds true when the volume change is negligible.

Answer 1

The Correct Option is D