Question

if you put a thermometer into a pot of melting ice, when will the temperature rise past zero? as soon as the ice begins to melt. after most of the ice has melted. when the ice begins turning into steam. when all the ice has melted.

Explanation:

During a phase - change (melting of ice), the temperature remains constant at the melting point (0°C for ice - water) until all the ice has melted. Only after all the ice has turned into water can the temperature of the water start to rise above 0°C.

Answer:

When all the ice has melted.