Definitions [2]
Define: Endothermic reaction
The reactions in which heat is absorbed are called endothermic reactions. The reactants absorb heat for form products.
Definition: Chemical Equation
A chemical equation is a balanced account of a chemical transaction. It is not merely a qualitative statement, but it also gives quantitative information of a chemical reaction.
OR
The representation of a chemical reaction in a condensed form using chemical formulae is called as the chemical equation.
Key Points
Key Points: Chemical Equations
- Word equations use names; chemical equations use formulas.
- Reactants → Products, with arrow showing reaction direction.
- Use + between two or more reactants or products.
- Show states: (s), (l), (g), (aq); use ↑ for gas, ↓ for precipitate.
- Heat (Δ) or other conditions go above/below the arrow.
