3. A small rock is heated and placed in a foam cup calorimeter containing 15.0 mL of water at 25.0*C. The water reaches a maximum temperature of 35.2*C. How many joules of heat are released by the rock? (Show all work including the equation you use to solve). (3 points).

The answer to your question is   Q = 640.5 J

Explanation:

Data

Volume of water = 15 ml

density of water = 1 g/ml

Temperature 1 = T1 = 25°C

Temperature 2= T2 = 35.2°C

Specific heat = 4.186 J/g°C

Process

1.- Calculate the mass of water

Mass = density x volume

         = 1 x 15

         = 15 g

2.- Substitution

      Q = mC(T2 - T1)

      Q = 15(4.186)(35.2 - 25)

-Simplification

      Q = 15(4.186)(10.2)

-Result

      Q = 640.5 J

answer; /// i do believe that the correct answer is (a) boiling

"standard molar enthalpy:

h2o ( liquid water ) : - 285.8 kj/mole

h2o ( water vapor ) : - 241.8 kj / mole.

δhrxn = - 241. 8 - ( - 285.8 )= -241.8 + 285.8 = 44.0

answer: 44.0 kj"