Question

Which of the following will not be affected by changes in temperature and pressure?

• A. Density
• B. Equilibrium constant
• C. Molar mass
• D. Freezing point
• E. Molarity

Answer 1

The correct option is C Molar mass

Properties are affected by a change in temperature and pressure.

For example, the phase of a substance is determined by its temperature and pressure, the density of fluid changes with temperature and pressure. Molarity is defined as the number of moles of solute dissolved per liter of solution. It is expressed in units as $mol/L$. Molar mass is the mass of one mole of substances. It does not change with temperature and pressure. All other properties like density, melting point, the equilibrium constant are temperature or pressure-dependent.