12. kdentical pieces of magnesium are added two beakers, A and B, hydrochloric a

Question

12. kdentical pieces of magnesium are added two beakers, A and B, hydrochloric acid. Both to containing acids have the same initial but their volwmes and damer Beaker A 200 100 em 0.50 moldm i HCIAq) 1.0 mol dami HCI(aq) 005 g Mg 0.05 g Mg Which statement A The maximum temperature in A will be higher than in B B. The maximum temperature in A and B wi be equal c It is not possible to predict whether A or B will have the higher maximum memperature. D The temperature in A and B will increase at the same rate (otal wark)

Explanation / Answer

Hi,

12. The maximum temperature in A and B will be equal, since both solution carries equal moles of HCl and Mg is limiting reagent. But the reaction rate will be different. Mg reacts more faster with dilute HCl so, beaker B has faster rate of reaction.

10, Melting of ice is an endothermic process, but neutralization and combustion reactions are exothermic. hence, option C is correct.

11. The reaction is exothermic and the products are more thermodynamically stable than reactants.

Thank you

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