Discussion Overview
The discussion revolves around the thermochemical reaction of zinc with hydrochloric acid and sulfuric acid, specifically focusing on the heat change associated with the reaction. Participants explore the stoichiometry of the reaction and the conditions under which the heat change of -150 kJ is achieved.
Discussion Character
- Homework-related, Exploratory, Technical explanation
Main Points Raised
- One participant states the reaction of zinc with hydrochloric acid and provides the enthalpy change of -150 kJ.
- Another participant suggests that the question may be a homework problem and encourages independent effort.
- A participant clarifies that they do not consider it a homework question and proposes that one mole of sulfuric acid reacts with excess zinc, citing the reaction Zn + H2SO4 → ZnSO4 + H2.
- Another participant advises writing the net ionic reaction equation to clarify the situation and indicates that the original poster is on the right track.
Areas of Agreement / Disagreement
There is no consensus on the exact amount of sulfuric acid required for the reaction to achieve the specified heat change, and participants express differing views on whether the question is homework-related.
Contextual Notes
Participants have not fully resolved the stoichiometric calculations or the implications of the enthalpy change in the context of using sulfuric acid instead of hydrochloric acid.