This question is about energy changes in reactions. Table 7.1 shows the results of four experiments. Table 7.1 (i) State which experiment shows the greatest temperature change. (ii) In experiment 4, zinc was added to dilute hydrochloric acid. Complete the symbol equation. $$\[ \mathrm{Zn}+\ldots . \mathrm{HCl} \rightarrow \mathrm{ZnCl}_{2}+\ldots \ldots \ldots . \]$$ (iii) Fig. 7.1 shows the incomplete reaction pathway diagram for the reaction in Experiment 4. Fig. 7.1 Complete Fig. 7.1 by labelling: - the vertical axis - the reactants - the products. N

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