1. What Is Molar Volume Of Water?

Molar volume is the volume occupied by one mole of a substance. For water at standard temperature and pressure (STP), the molar volume is approximately 18.02 mL/mol, calculated using the molar mass and density of water.

2. How Does The Calculator Work?

The calculator uses the molar volume formula:

Where:

• \( V_m \) — Molar volume (mL/mol)
• \( M \) — Molar mass (g/mol)
• \( \rho \) — Density (g/mL)

Explanation: The formula calculates the volume occupied by one mole of a substance by dividing its molar mass by its density.

3. Importance Of Molar Volume Calculation

Details: Molar volume is essential in chemistry for stoichiometric calculations, gas law applications, and understanding the physical properties of substances. For water, it's particularly important in solution chemistry and phase change studies.

4. Using The Calculator

Tips: Enter the molar mass in g/mol and density in g/mL. For water at 4°C, use M = 18.02 g/mol and ρ = 1.00 g/mL. All values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: Why is water's molar volume 18.02 mL/mol at STP?
A: This value comes from dividing water's molar mass (18.02 g/mol) by its density at STP (1.00 g/mL), giving 18.02 mL/mol.

Q2: How does temperature affect water's molar volume?
A: As temperature increases, water's density decreases, causing the molar volume to increase. The calculator uses the density at the specified conditions.

Q3: What is the difference between molar volume and specific volume?
A: Molar volume is volume per mole (mL/mol), while specific volume is volume per unit mass (mL/g). They are related by the molar mass.

Q4: Can this calculator be used for other substances?
A: Yes, the formula applies to any pure substance. Just input the correct molar mass and density for that substance.

Q5: Why is molar volume important in gas calculations?
A: For ideal gases at STP, molar volume is approximately 22.4 L/mol, which is fundamental for gas stoichiometry and Avogadro's law applications.