In a chemical reaction, if the enthalpy of products is less than that of reactants, what can be concluded?
Practice Questions
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Q1
In a chemical reaction, if the enthalpy of products is less than that of reactants, what can be concluded?
The reaction is endothermic
The reaction is exothermic
The reaction is at equilibrium
The reaction is spontaneous
If the enthalpy of products is less, the reaction releases heat, indicating it is exothermic.
Questions & Step-by-step Solutions
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Q
Q: In a chemical reaction, if the enthalpy of products is less than that of reactants, what can be concluded?
Solution: If the enthalpy of products is less, the reaction releases heat, indicating it is exothermic.
Steps: 5
Step 1: Understand what enthalpy means. Enthalpy is a measure of the total energy of a system, including internal energy and the energy required to make room for it by displacing its environment.
Step 2: Identify the two parts of a chemical reaction: reactants (the starting materials) and products (the substances formed).
Step 3: Compare the enthalpy of the reactants and products. If the enthalpy of the products is less than that of the reactants, it means the products have lower energy.
Step 4: Recognize that when products have lower energy, the excess energy is released during the reaction, usually in the form of heat.
Step 5: Conclude that the reaction is exothermic, meaning it releases heat to the surroundings.
