How is Hess's law used to calculate the enthalpy change of a reaction? A. The enthalpy of the products is subtracted from the enthalpy of
the reactants,
O B. The enthalpy is calculated from the experimentally determined
equilibrium constant.
C. The enthalpy changes of each step of the reaction are added
together
O D. The enthalpy is determined experimentally using a bomb
calorimeter.

The  grandmother cell  is a hypothetical  neuronthat represents a complex but specific concept or object.[1]  it activates when a person "sees, hears, or otherwise sensibly discriminates"[2]  a specific entity, such as his or her grandmother. the term was in use at least as early as 1966 amongst staff and students in the department of experimental psychology, university of cambridge, england. a similar concept, that of the  gnostic neuron, was proposed two years later

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