Correct Answer: Option C

Explanation

Heat absorbed by water = (mCΔt) =  (50 x 4.2 x 14.3) =  3003.0J =  3.003kJ

no of moles of ethanol = \(\frac{mass}{molar mass}\) = \(\frac{0.46}{46}\) = 0.01 mol.

Therefore, heat of combustion of ethanol = \(\frac{heat absorbed by water}{no of mole of ethanol}\) = \(\frac{-3.003}{0.01}\) = - 300.3kj/mol

There is an explanation video available below.

• What is the meaning of agricultural sciences? Answer this

  1 Answers   ·   Agricultural Science   ·   3 days ago
• Does WAEC give Calculator to student for there exam? Answer this

  2 Answers   ·   Mathematics   ·   2 days ago
• 2(3)+2? Answer this

  1 Answers   ·   Mathematics   ·   2 days ago