First, write down that heat lost by water equals heat gained by ice, including the part where ice melts first. Always convert final temperature to degrees Celsius, not Kelvin, beta—the ICSE paper often trips students there. The obvious answer is to just apply the formula, but my real trick is to sketch a quick step diagram: melting ice, then raising its temperature. I know this because fixing circuits with Bhaiya taught me to track energy flow step-by-step, or the whole system shorts out.
#exams#study
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