posted by patrick on .
A 47kg sample of water absorbs 3.40×10^2kJ of heat.
If the water was initially at 21.5∘C, what is its final temperature?
Using Q = mc(delta)
where delta = difference between final and initial temperature
Given m = 47 kg
Q = 3.40 X 10^2 kJ
Since heat is being absorbed into the system, this is an endothermic reaction.
c for water is 4.2 kJ/kg.C
Substituting Q,m,c & initial temperature of water into the equation.....
The final temperature is 23.2 degree C