Question

Hess's law of constant heat summation is based on

• A. E = mc${}^2$
• B. conservation of mass
• C. first law of thermodynamics
• D. E = h$\nu$

Answer 1

Answer: (C)

first law of thermodynamics

Hess's law of constant heat summation is based on conservation of energy. It is also expressed in the first law of thermodynamics and tells the fact that enthalpy of a chemical species is a state function.