An ideal gas equation is also called the …I… Here, I refers to — States of Matter and Gaseous State Chemistry Question

💡 Solution & Explanation

# Ideal Gas Equation **Step 1: Identify the equation** The ideal gas equation is: $$PV = nRT$$ where $P$ = pressure, $V$ = volume, $n$ = moles, $R$ = gas constant, $T$ = temperature. **Step 2: Recall the historical name** This equation is also called the **equation of state** for an ideal gas because it describes the relationship between the state variables ($P$, $V$, $T$, $n$) of a gas system. **Step 3: Why "equation of state"?** An equation of state defines how the state of a substance changes with respect to its thermodynamic variables. The ideal gas equation uniquely relates all four fundamental properties of a gas system, making it the fundamental equation of state for ideal gases. **Answer:** $I$ = **Equation of State** (Option A) This term distinguishes it from other gas laws (Boyle's, Charles's, etc.) which only relate two variables, whereas the complete equation of state encompasses all variables simultaneously.