Chemistry 9701 · AS & A Level · Chemical energetics

Chemical energetics — practice question

During an experiment, the combustion of $1.45\,$g $(0.025\,$mol$)$ of propanone was used to heat $100\,$g of water. The water started at a temperature of $20.0^\circ\text{C}$ and finished at $78.0^\circ\text{C}$. What experimental value for the enthalpy change of combustion for propanone can be obtained from these results?

  • A$-1304\,\text{kJ mol}^{-1}$
  • B$-970\,\text{kJ mol}^{-1}$
  • C$-352\,\text{kJ mol}^{-1}$
  • D$-24.2\,\text{kJ mol}^{-1}$

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