Chemistery
posted by May .
200g of water (specific heat of 4.184 Jg1'c1) loses 2000 J of heat. Its starting temperature is 70'C. Calculate the temperature of the water.

mass water x specific heat water x (TfinalTinitial) = q = 2000 J.
Solve for Tfinal 
2000J=200g*4.184J/gC*(Tf70C)
solve for Tf 
Calculate the heat in kilojoules needed to vaporize 2.00g of water at 100 celcius.