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Liquid ammonia is used to refrigeration because of itsA. pyramidal shapeB. high dipole momentC. high heat of vaporizationD. stability |
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Answer» Correct Answer - 3 Ammonia condenses to aliquid at`-33.3^(@)C`.This boiling point is much higher than that of phosphine ,`PH_(3)(-134^(@)C)`, because ammonia molecules form strong hydrogen bonds with their neighbors. The ammonia molecules has a fairly large dipole moment which explains why liquid ammonia is such a good polar solvent. the molecules in liquid `NH_(3)` are associated by htdrogen bonding, as in water, and because considerable energy is needed to break these bonds and vaporize the substances as single molecules,the latent heat of vaporization is unusually very high`(327" calg"^(-1))`.Thus ,liquid `NH_(3)` is used as a refrigerant in ice plants. |
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