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Physics - Heat & Thermo Question with Solution | TestHub

PhysicsHeat & ThermoCalorimetryMedium2 minQB

PhysicsMediumsingle choice

If two bodies of water and steam are both at $100^{\circ} C$ and have the same mass. They are in contact with our skin, which is likely to cause a more severe burn?

Options:

Answer:

Solution:

Steam first condenses on the skin, releasing latent heat.
$Δ T = 100 - T_{skin}$
For equal masses, water transfers:
$Q_{w} = m c_{w} Δ T$
Steam transfers:
$Q_{s} = m L_{v} + Q_{w}$
$Q_{s} > Q_{w}$
Steam therefore causes the more severe burn.

Stream:JEESubject:PhysicsTopic:Heat & ThermoSubtopic:Calorimetry

⏱ 2mℹ️ Source: QB

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