52) Xplain Y ice melts at 0 degrees c w/o an increase of temp, even tho heat is flowin from the surroundings in2 the system.
64) Equal masses of 2 substances absorb the same amount of heat. The Temp of substance “A” increases twice as much as the Temp of substance “B”. Which substance has higher specific heat? Xplain
72) A orange contains 445 kj of energy. What mess of water could this same amount of energy raise from 25 degrees Celsius to the boiling point?
76)C- if a thermometer means pressure, what does a calorimeter do? Pick: constant pressure, reactants, endothermic, or heat.
82)The temp of a person w/ an extremely
high fever can be lowered w/ a sponge bath
of isopropyi alcohol (C3H7OH). The heat of
vaporization of this alcohol is 11.1 kcal/mol.
A) How many kilocalories of heat are removed
from a person's skin when 175 g of isopropyl
alcohol evaporates? How many kilojoules?
B)How many kg of water would this
energy loss cool in lowering the temp
from 40.0 C to 36.0 C?
2007-03-03
09:48:29
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1 answers
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asked by
truckin_90
2
in
Science & Mathematics
➔ Chemistry