Chemistry Science

Difference between Gas and Vapor

  • Main Difference

    Gas is the form of a substance that looks just like air and moves freely within our atmosphere. On the other hand, vapor is a substance that remains suspended in air and diffuses at a fast rate just like a solid or a liquid.

    Comparison Chart

    Basis of Distinction Gas Vapor
    Definition Something that we cannot see but are able to smell or feel. Form that we can see, but originates from gas.
    State Becomes the lowest state that a matter can exist. Becomes the state between liquid and gas.
    Nature It has a thermodynamic state at room temperature. Exists as the mixture of two states at room temperature.
    Characteristics Disperse whenever changes to equilibrium take place. Stays the same even if equilibrium state changes.


    The reason it has the freedom to go here and there depends on the amount of molecules and atoms that do not have anything bounding them, and therefore they go from one place to the other without any hesitation. They have more kinetic energy than normal, and therefore the movements become random, giving them the benefit of moving from place to place. At the point when a specimen of matter in the vaporous state is cooled to a sufficiently low temperature, it might turn into a fluid or active. For instance, if nitrogen is chilled to a temperature far beneath zero Celsius, it melts. Liquid nitrogen is utilized by some therapeutic specialists to demolish minor skin sores, for example, warts. Another gas, carbon dioxide, avoids the liquid stage when cooled at the climatic weight, and turns into a stable known as dry ice. On the off chance that a specimen of vaporous matter, kept to a holder of settled size, is warmed, the weight increments. If the sample is cooled, the pressure drops. On the off chance that an example of the vaporous matter put in a fixed holder and after that, the volume of the compartment is decreased, the pressure warms the gas. On the off chance that the volume of the fixed chamber expands, the decompression cools the gas.


    It gains such a form due to the process of boiling or heating such as the one takes place when we boil water. At such a point when the temperature becomes equal the maximum required to give it a distinctive nature then it starts to evaporate and then takes the vaporous form. Vapor turn to a gas stage at a temperature where a similar substance can also exist in the fluid or active state, under the initial temperature of the element. If the vapor is in contact with a liquid or latter stage, the two stages will be in a condition of harmony. The term gas points to a compressible liquid stage. Such gasses will be gasses for which no fluid or active can frame at the temperature of the gas, for example, air at average surrounding temperatures. A liquid or solid does not need a bubble to discharge a vapor. The weight is same as the weight of a liquid or a stable at a specific temperature. For most cases, the temperature ranges move below critical, and even some pressure application changes its state from one to the other. For different substances, the temperature changes for it to become a liquid and therefore needs proper calibration.

    Key Differences

    • Gas becomes the most random state of matter whereas vapor becomes known as a stable state of mater.
    • Gas is the state of matter that falls in the lowest category whereas the term vapor become useful for the state that falls between liquid and gas.
    • A substance becomes gas when the molecules gain more kinetic energy and therefore move at random speeds in the atmosphere. On the other hand, a substance becomes vapor when the critical temperature goes beyond the limit for a liquid or a solid substance.
    • Gas has a thermodynamic state at room temperature whereas vapor exists as the mixture of two states at room temperature.
    • Gas does not have the capacity to exist whenever the change takes place at rapid speeds, whereas vapors have the capacity of existing even when the changes take place rapidly.

    Video Explanation