Temperature is the most important factor in determining the state of a substance because it determines the kinetic energy of the particles of the substance.
Temperature is generally defined as the measure of the average kinetic energy of the particles of a substance.
This means that the higher the temperature of a substance, the greater the kinetic energy of the particles of the substance.
Also, the magnitude of kinetic energy of the particles of a substance determines the state of the substance.
Gas particles have the highest magnitude of kinetic energy followed by liquid particles. Solid particles have the least kinetic energy.
The state of a substance can be changed by increasing or decreasing the kinetic energy of its particles and this is achieved by changing the temperature of the substance.
Therefore, temperature is the most important factor in determining the state of a substance.
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