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 53.0°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 53.0°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 53.0°C. (Flesh is badly damaged at 50.0°C.)
steam=______kg

water=_______kg

Answer 1

The heat that must removed to change the temperature of water from 100°C to 53°Cis 100-53) e1 (6 g)(1 cal/g.°C)(100-53) e 282 cal e 0.282 kcal The heat that must removed to change the temperature of steam from 100°C to 53°C is e2-ms (100-53) +mL 02-(6 g) (1 cal/g. C) (100- 53) +6x540 02 3.5 kcal The mass of human fles required to raise the temperature from 37 to 53 is 2,35x10 cal - 263 6 g - 264g (53-37) (083)(16) The mass of human fles required to raise the temperature from 37 to 53 is 282 ca2126& ei s(53-37) (0.83) (16)