Question

What is a phase diagram?

• A. A graph of the physical state of a substance (solid, liquid or gas) and the temperature and pressure of the substance.
• B. A graph of the physical state of a substance (solid, liquid or gas) and the temperature and state of the substance.
• C. A graph of the physical state of a substance (solid, liquid or gas) and the reactants and products of the substance.
• D. A diagram showing the phases of a liquid.
• E. A diagram showing the phases of a gas

Answer 1

The correct option is A A graph of the physical state of a substance (solid, liquid or gas) and the temperature and pressure of the substance.

A phase diagram is the graphical representation of the variation of the physical state of a substance under different condition of temperature and pressure in which generally pressure is taken on y-axis and temperature is taken on the x-axis.

It illustrates how the phases of a substance changes when the conditions of temperate and pressure are changed.

Hence the correct option is A.