Same chapter3 marksDifficulty: Medium
Why is a burn caused by steam at 100 °C more severe than one caused by water at 100 °C?
Calorimetry
3 marksDifficulty: Medium
Calculate the heat energy needed to raise the temperature of 200 g of water from 25 °C to 75 °C. (Specific heat capacity of water = 4.2 J g−1 °C−1)
Original Khojo Papers practice question — not from a past board paper.
Answer
42 000 J
No citable source has been recorded for this record. Treat it as practice material, not as fact.
Explanation
Heat = mass × specific heat capacity × rise in temperature = 200 × 4.2 × 50 = 42 000 J.
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