Question

Burns produced by steam at 100°C are much more severe than those produced by the same mass of 100°C water. To verify this:

(a) Calculate the heat that must be removed from 6.00 g of 100°C water to lower its temperature to 45.0°C.
kcal
(b) Calculate the heat that must be removed from 6.00 g of 100°C steam to condense it and lower its temperature to 45.0°C.
kcal
(c) Calculate the mass of human flesh that the heat produced in each case can raise from the normal 37.0°C to 45.0°C. (Flesh is badly damaged at 50.0°C.)
steam:
kg
water:
kg

The specific heat capacity of flesh is 829 cal/(kg °C)
The specific heat capacity of water is 1000 cal/(kg °C)
The specific heat capacity of steam is 480 cal/(kg °C)
The latent heat of vaporization for H₂O (steam - water) is 539 kcal/kg

Answer 1