Question
What must be true for any endothermic reaction? (2 points)
Group of answer choices
The chemical bonds of the products have more energy than the chemical bonds of the reactants.
There are more products than there are reactants.
There must be a phase change from solid to liquid or from liquid to gas.
The reaction must take place in a sealed container held at constant volume.
Group of answer choices
The chemical bonds of the products have more energy than the chemical bonds of the reactants.
There are more products than there are reactants.
There must be a phase change from solid to liquid or from liquid to gas.
The reaction must take place in a sealed container held at constant volume.
Answers
GPT-4o mini
For any endothermic reaction, the following must be true:
1. **The chemical bonds of the products have more energy than the chemical bonds of the reactants.** This is a defining characteristic of endothermic reactions, where energy is absorbed from the surroundings to form higher-energy products.
The other options are not necessarily true for all endothermic reactions. Specifically:
- There are not always more products than reactants in an endothermic reaction; the stoichiometry can vary.
- A phase change is not required; endothermic reactions can occur without a phase change.
- The reaction does not have to take place in a sealed container or at constant volume.
Thus, the correct answer is: **The chemical bonds of the products have more energy than the chemical bonds of the reactants.**
1. **The chemical bonds of the products have more energy than the chemical bonds of the reactants.** This is a defining characteristic of endothermic reactions, where energy is absorbed from the surroundings to form higher-energy products.
The other options are not necessarily true for all endothermic reactions. Specifically:
- There are not always more products than reactants in an endothermic reaction; the stoichiometry can vary.
- A phase change is not required; endothermic reactions can occur without a phase change.
- The reaction does not have to take place in a sealed container or at constant volume.
Thus, the correct answer is: **The chemical bonds of the products have more energy than the chemical bonds of the reactants.**