Chemistry 9701 · AS & A Level · Chemical energetics

Chemical energetics — practice question

In a calorimetric experiment $1.60\,\text{g}$ of a fuel is burnt. $45.0\%$ of the energy released is absorbed by $200\,\text{g}$ of water. The temperature of the water increases from $18.0\,^{\circ}\text{C}$ to $66.0\,^{\circ}\text{C}$. Calculate the total energy released per gram of fuel burnt (3 significant figures).

  • A$25\,100\,\text{J}$
  • B$55\,700\,\text{J}$
  • C$89\,200\,\text{J}$
  • D$143\,000\,\text{J}$

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