Question
The dissolution of calcium chloride in water is given by the following equation:
CaCl (s) + 2H O → Ca(OH) (aq) + 2HCl(g) + heat
How would an energy graph of this reaction appear?
(1 point)
2 2 2
The reactants and products would appear at a high energy state.
The reactants would appear at a lower energy state than the products.
The reactants and products would appear at a low energy state.
The reactants would appear at a higher energy state than the products.
CaCl (s) + 2H O → Ca(OH) (aq) + 2HCl(g) + heat
How would an energy graph of this reaction appear?
(1 point)
2 2 2
The reactants and products would appear at a high energy state.
The reactants would appear at a lower energy state than the products.
The reactants and products would appear at a low energy state.
The reactants would appear at a higher energy state than the products.
Answers
GPT-4o mini
To interpret the energy graph of the dissolution of calcium chloride (CaCl₂) in water, we need to consider whether the reaction is exothermic or endothermic.
The given reaction generates heat, which suggests that it is an exothermic reaction. In exothermic reactions, the energy of the products is lower than that of the reactants, as energy is released to the surroundings.
Therefore, in an energy graph for this reaction:
- The reactants (CaCl₂ and water) would be at a higher energy state.
- The products (calcium hydroxide and hydrogen chloride gases) would be at a lower energy state.
Based on this reasoning, the correct choice is:
**The reactants would appear at a higher energy state than the products.**
The given reaction generates heat, which suggests that it is an exothermic reaction. In exothermic reactions, the energy of the products is lower than that of the reactants, as energy is released to the surroundings.
Therefore, in an energy graph for this reaction:
- The reactants (CaCl₂ and water) would be at a higher energy state.
- The products (calcium hydroxide and hydrogen chloride gases) would be at a lower energy state.
Based on this reasoning, the correct choice is:
**The reactants would appear at a higher energy state than the products.**