Chemistry
Grade-10
Easy
Question
An exothermic reaction:
- Always involves a solid and a liquid.
- Causes a cooling effect in the surrounding environment.
- Is a reaction in which the atoms in a substance expand or explode.
- Releases more energy into the surroundings than it absorbs.
Hint:
Exothermic process produces heat as a byproduct.
The correct answer is: Releases more energy into the surroundings than it absorbs.
An exothermic reaction: Releases more energy into the surroundings than it absorbs.
- These reactions have the standard enthalpy (
) change of reactions a negative value.
- It is the opposite of an endothermic reaction that involves the absorption of heat.
- These reactions usually lead to an increase in the entropy of the surroundings.
- Reactants
Products + Energy
) change of reactions a negative value. Products + Energy 
