Chemistry 9701 · AS & A Level · Chemical energetics

Chemical energetics — practice question

To calculate the enthalpy change, $\Delta H$, for an experiment that uses solutions, the mass of the solution, $m$, the specific heat capacity of the solution, $c$, and the temperature change, $\Delta T$, are required. $\Delta T = T_{\text{final}} - T_{\text{initial}}$ Which expression for $\Delta H$ is correct?

  • A$\Delta H = \frac{mc}{\Delta T}$
  • B$\Delta H = -\frac{mc}{\Delta T}$
  • C$\Delta H = mc\Delta T$
  • D$\Delta H = -mc\Delta T$

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