Posted by mike on Wednesday, May 4, 2011 at 9:30pm.
If 1200 cal of heat are added to 50 g of water initially at a temperature of 15 oC, what is the final temperature of the water?

physics  Jai, Wednesday, May 4, 2011 at 10:00pm
the energy needed to increase or decrease the temperature of a given substance is given by
Q = mc(T2T1)
where
Q = heat (in J or cal)
m = mass (in g)
c = specific heat capacity (in J/g*K or cal/g*K)
T = temperature (in Kelvin)
**change in temperature can have unit degree Celsius or Kelvin,, thus you can use it interchangeably (what i mean is that the units for c can also be J/(g*C))
signs:
Q: (+) when heat is absorbed by substance
Q: () when heat is released from substance
for water, c = 1 cal/g*K.
substituting,
1200 = (50)(1)(T2  15)
1200 = 50*(T2)  750
1950 = 50*(T2)
T2 = 39 deg C
hope this helps~ :)
Answer This Question
Related Questions
 physics  0.1kg of ice initially at a temperature of 10 degrees Celsius is ...
 CHEM  You have a bottle of water. The water has a mass of 29 grams. You heat ...
 Physics  Ice of mass 51.5 g at 10.2° C is added to 218 g of water at 13.5° C ...
 Physics  500 J of heat are added to 59 g of water initially at 20°C. (a) How ...
 Science  90 calories of heat is added to 1 gram of fresh water with an initial ...
 Physics  A 100g aluminum calorimeter contains a mixture of 40 g of ice and 200...
 physics  Assume that 10 g of steam is added to 100 g of water initially at 19°C...
 physics  1. Assume that 10 g of steam is added to 100 g of water initially at ...
 physical science  If 500 kg of water at 200 degrees F is poured into a lake ...
 physics  A 40g block of ice is cooled to −71°C and is then added to 590...
More Related Questions