Chemistry 0620 · IGCSE · Exothermic and endothermic reactions

Exothermic and endothermic reactions — practice question

The starting and ending temperatures for four separate reactions are recorded. Which reaction gives off the least heat?

  • Ainitial temperature $19^{\circ}\text{C}$, final temperature $25^{\circ}\text{C}$
  • Binitial temperature $21^{\circ}\text{C}$, final temperature $18^{\circ}\text{C}$
  • Cinitial temperature $22^{\circ}\text{C}$, final temperature $17^{\circ}\text{C}$
  • Dinitial temperature $22^{\circ}\text{C}$, final temperature $26^{\circ}\text{C}$

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