Question

How much heat is required to raise the temperature of a solution that is made from adding 25 ml of hno3 to 75 ml of h2o from 12∘c to 18∘c ?

Answer 1

 assuming the specific heat is the same as the sp. heat of water, 
total volume = 100 mL ... assume again that the density is ~1.0, mass = 100g 
Q = (100)(4.184)(18-12) << use a calculator 
... answer will be in j.