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During summers in India, one of the common practice to keep cool is to make ice balls of crushed ice, dip it in flavoured sugar syrup and sip it. For this a stick is inserted into crushed ice and is squeezed in the palm to make it into the ball. Equivalently in winter, in those areas where it snows, people make snowballs and throw around. Explain the formation of ball out of crushed ice or snow in the light P-T diagram of water.

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From the P-T graph, we know that at decreasing pressure in the liquid state at 0^{\circ}C and 1 atm takes water to ice state & increasing pressure from 0^{\circ}C to 1 atm takes water to ice state.

If we squeeze crushed ice, some parts of it melt into water at 0^{\circ}C and fill the gap between ice flakes. Also, when we squeeze crushed ice, its melting point increases and the water present in the ice flakes freezes binding them together and making the ball more stable.

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