Question

The heat of combustion of methane is -880 kJ ${mol}^{-1}$. If 3.2 g of methane is burnt _________ of heat is evolved.

• A. 88 kJ
• B. 264 kJ
• C. 176 kJ
• D. 440 kJ

Answer 1

Answer: (C)

176 kJ

For burning one mole of methane $880$ $kJ$ is evolved.

For $\frac{3.2}{16}$ $moles$ of methane.

Heat evolved $=\frac{880}{5}=176$ $kJ$