3.1 Energy Changes in Chemical Reactions

Report 1 / 5

Which of the following is the energy profile diagram for this reaction?

\(Zn +2HCl \rightarrow ZnCl_2+ H_2; \, \Delta H=-126kJ\)

Difficulty Level: Medium

Report 2 / 5

Which of the following reactions is endothermic reaction?

Difficulty Level: Medium

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Which of the following reactions are correct?

Difficulty Level: Medium

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What is the heat of reaction, \(\Delta H\) for this reaction?

Difficulty Level: Medium

Report 5 / 5

1 gram of zinc powder is added into 10ml of hydrochloric acid.

Which of the following statement is not true regarding the mentioned reaction?

(A)	The reaction is an endothermic reaction.

(B)

(C)	The container containing the solution feels a bit warmer.

(D)	The reaction is an exothermic reaction.

Difficulty Level: Medium