Verified Answer :

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]