Chemistry 9701 · AS & A Level · Chemical energetics

Chemical energetics — practice question

During a calorimetric experiment, $1.60\,\text{g}$ of a fuel is burnt. $45\%$ of the energy released is absorbed by $200\,\text{g}$ of water, causing its temperature to increase from $18^{\circ}\text{C}$ to $66^{\circ}\text{C}$. The specific heat capacity of water is $4.2\,\text{J g}^{-1}\text{K}^{-1}$. What is the total energy released per gram of fuel burnt?

  • A$25\,200\,\text{J}$
  • B$56\,000\,\text{J}$
  • C$89\,600\,\text{J}$
  • D$143\,360\,\text{J}$

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