OnlineCBT
Chemistry · THERMODYNAMICS
हिन्दीThe standard enthalpy of combustion of butane (\( \text{C}_4\text{H}_{10} \)) is \( -2658.0\text{ kJ mol}^{-1} \). The amount of heat liberated during the complete combustion of \( 14.5\text{ g} \) of butane is:
Correct answer · Option 2
664.5 kJ
Explanation
Molar mass of butane (\( \text{C}_4\text{H}_{10} \)) is \( 58\text{ g mol}^{-1} \). Moles \( = 14.5 / 58 = 0.25\text{ mol} \). Heat released \( = 0.25 \times 2658.0 = 664.5\text{ kJ} \).
