The highest boiling point is of CH₄. CH₄ has highest boiling point because CH₄ molecular weight is more as compared to H₂.
The edge of boiling over of a substance is the temperature at which the fume strain of a fluid equivalents the tension encompassing the liquid and the fluid changes into a fume.
The typical edge of boiling over (likewise called the environmental limit or the climatic tension edge of boiling over) of a fluid is the unique case where the fume strain of the fluid equivalents the characterized barometrical strain adrift level, one air.
The intensity of vaporization is the energy expected to change a given amount (a mol, kg, pound, and so on) of a substance from a fluid into a gas at a given strain (frequently climatic tension).Edge of boiling over is straightforwardly relative to the atomic mass of the compound. Since CH₄ sub-atomic weight is 16 g/mol while H₂ has sub-atomic weight of 2 g/mol, along these lines intermolecular force is more in CH₄ as compared to H₂.
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