In a homogeneous system , all the reactants and products are in the — Chemical Equilibrium Chemistry Question

💡 Solution & Explanation

# Homogeneous System Definition **Step 1: Understand what "homogeneous" means** A homogeneous system is one where the composition and properties are uniform throughout. There is only one phase present. **Step 2: Identify the phase requirement** In a homogeneous system, all reactants and products must exist in the **same physical state** (phase). This ensures uniformity across the entire system. **Step 3: Common examples** - All gases: $2NO_2 \rightleftharpoons N_2O_4$ (both reactant and product are gases) - All liquids: aqueous solutions where reactants and products dissolve completely - All solids: solid-state reactions at high temperatures **Step 4: Contrast with heterogeneous systems** Heterogeneous systems have reactants or products in **different phases** — for example: $$CaCO_3(s) \rightarrow CaO(s) + CO_2(g)$$ (solid reactant; solid and gas products) --- **Answer: All reactants and products are in the **same phase** (or same state of matter).** The correct option B likely states this explicitly — whether it says "same phase," "same state," or "solution" (for aqueous systems), it captures the essence that homogeneity requires uniform composition throughout.