when 200 grams of water cools from 50 c to 25 c the total amount of heat energy released by the water is?
Specific Heat:
Heat Energy= Mass of substance X Specific Heat X Change in Temp.
1. change in temp |50-25| = 25
2. specific heat of Water(H2O) = cal/g (Celsius) 1.000
heat energy= 200g X 1.000 X 25
Heat energy = 5000cal
Answer : The heat released by the eater is, \(2.1\times 10^4J\)[/tex]
Explanation :
Formula used :
\(Q=m\times c\times \Delta T\)
or,
\(Q=m\times c\times (T_2-T_1)\)
where,
Q = heat released = ?
m = mass of water = 200 g
c = specific heat of water = \(4.184J/g^oC\)
\(T_1\) = initial temperature = \(50^oC\)
\(T_2\) = final temperature = \(25^oC\)
Now put all the given value in the above formula, we get:
\(Q=200g\times 4.184J/g^oC\times (25-50)^oC\)
\(Q=20920J=2.1\times 10^4J\)[/tex]
Therefore, the heat released by the eater is, \(2.1\times 10^4J\)[/tex]