Question

Differentiate between a gas and vapour.

Answer 1

A gas refers to a substance that has a single defined thermodynamic state at room temperature whereas a vaporrefers to a substance that is a mixture of two phases at room temperature, namely gaseous and liquid phase. ... Avapour can co-exist with a liquid or solid when they are in equilibrium state.

Answer 2

In my sentence, gas and vapour are one word. In normal we speak gas and when we study Science we called it as vapour or sometimes gas.
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