Assuming the ice temperature is 0 °C and the water temperature 20 °C, the latter will freeze. Use the thermal equilibrium calculator or:
Remember, if the ice melts fully, that will require a latent heat of 334 KJ.
Calculate the heat released for a 20 °C change (1 kg of water, 20 °C to 0 °C): 83,620 J.
Notice that the heat released by water from 20 °C to 0 °C is less than the required latent heat: 83,620 J < 334 KJ, meaning that the liquid water will not be able to melt the ice but instead will freeze.
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