Chemistry 9701 · AS & A Level · Chemical energetics

Chemical energetics — practice question

This question involves the use of the Data Booklet. A hydrocarbon sample with a mass of $0.47\,\text{g}$ was burned completely in air, and the energy given off raised the temperature of $200\,\text{g}$ of water from $23.7^{\circ}\text{C}$ to $41.0^{\circ}\text{C}$. What amount of energy did the water absorb?

  • A$0.47 \times 4.18 \times 17.3\,\text{J}$
  • B$0.47 \times 4.18 \times (273 + 17.3)\,\text{J}$
  • C$200 \times 4.18 \times 17.3\,\text{J}$
  • D$200 \times 4.18 \times (273 + 17.3)\,\text{J}$

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