Physics - Heat & Thermo Question with Solution | TestHub
PhysicsHeat & ThermoThermal ExpansionMedium2 minQB
PhysicsMediumstatement
Explain why burns caused by steam on the skin is more severe than that by boiling water. Evaluate the following statements.
Statement I: Steam condenses and releases latent heat before the resulting water cools, so it delivers more energy for equal mass at the same initial temperature.
Statement II: Steam contains no internal energy.
Options:
Answer:
B
Solution:
Steam at 100°C first condenses on the skin, releasing its latent heat ( per g) and then cools as water. Boiling water at releases only (about 4.2 J per g per °C). For the same mass, steam gives out many times more heat to the skin. Statement I is true and Statement II false. Correct option: (B).
Subject:PhysicsTopic:Heat & ThermoSubtopic:Thermal Expansion
⏱ 2mℹ️ Source: QB
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