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If an ice cube melts at 0c but water freezes at 0'c what is the difference between melting and freezing in terms of a) the energy involved in the phase changes and (b) particles of the substance during phase change

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IA. If energy is being absorbed, then more hydrogen bonds are being broken. If energy is being released,more hydrogen bonds become fixed.
B. Durning melting, hydrogen bonds get broken and movement can occur. Durning freezing hydrogen bonds become fixed and water molecules can’t move as much

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