Chapter 12.3, Problem 19SSC

Interpretation Introduction

Interpretation:

The factors must be described that affect viscosity.

Concept introduction:

Viscosity is a force which opposes the flow of a fluid like liquid or gas.

Answer to Problem 19SSC

Concentration, temperature, pressure, shape of the particles and nature of the substance affect viscosity.

Explanation of Solution

Viscosity increases with increase in concentration.

It decreases with increase in temperature.

Spherical particles have less viscosity as compared to linear particles as linear particles have a tendency to form a network within the medium.

Liquids which can form more number of hydrogen bonds are very much viscous. For example phosphoric acid is more viscous as compared to sulfuric acid.

Conclusion

Viscosity is affected by many factors like temperature, pressure, shape of particles, concentration and nature of the substance.