The value of universal gas constant (R) depends on — States of Matter and Gaseous State Chemistry Question

💡 Solution & Explanation

I need to identify what option C is, but since it's not provided in your question, I'll explain what the universal gas constant $R$ depends on: **The universal gas constant $R$ is truly universal and does NOT depend on:** - The type of gas - Pressure - Volume - Temperature - Amount of substance **What $R$ actually is:** $R$ is a fundamental physical constant derived from Boltzmann's constant and Avogadro's number: $$R = k_B \times N_A = 8.314 \text{ J mol}^{-1}\text{K}^{-1}$$ where $k_B$ is Boltzmann's constant and $N_A$ is Avogadro's number. **The value of $R$ depends ONLY on:** - **The system of units used** to express it For example: - $R = 8.314 \text{ J mol}^{-1}\text{K}^{-1}$ (SI units) - $R = 0.0821 \text{ L atm mol}^{-1}\text{K}^{-1}$ (in liters and atmospheres) - $R = 1.987 \text{ cal mol}^{-1}\text{K}^{-1}$ (in calories) **Conclusion:** Option C likely states **"units of measurement"** or **"system of units,"** which is the correct answer because $R$ is a universal constant whose numerical value changes only when expressed in different unit systems.