give reason for the following -(a) ice at 0c appears colder in the mouth then water at 0c
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because when ice changes to water it absorbs some heat at latent heat which break the intermolecular forces but doesn't change the temperature so definitely ice will be colder than water at 0 degree Celsius.
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This is because of the difference in the heat energies absorbed by the two substances that you've mentioned
Water at 0 C has undergone melting and in the process, has absorbed the latent heat of vaporisation which reduces the forces of attraction or the bonds between the water molecules ( latently heat of vaporisation is around 3.6 * 10^2 Kj/Kg at STP
Ice at 0 C has not yet absorbed all the latent heat and is in the process of absorbing it and hence, it has less energy though the temperatures of both substances are same
Water at 0 C has undergone melting and in the process, has absorbed the latent heat of vaporisation which reduces the forces of attraction or the bonds between the water molecules ( latently heat of vaporisation is around 3.6 * 10^2 Kj/Kg at STP
Ice at 0 C has not yet absorbed all the latent heat and is in the process of absorbing it and hence, it has less energy though the temperatures of both substances are same
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