When zinc is dissolved in H2SO4, 4.40⋅105 J of heat is released, and 2.34⋅105 J of energy is required to separate copper from CuSO4. It would seem that the EMF of a Daniel element can be calculated by equating the difference of these energy values to the flowing charge multiplied by the EMF. Calculate the EMF in this way with an accuracy of 1%. However, the true EMF value is large (at normal temperature it is equal to 1.09 V). What's the matter? Where does the energy come from?