When considering free energy change, biochemists usually define a standard state, the biochemical standard state, which is modified from the chemical standard state to fit biochemical applications. Determine which of the phrases describe the biochemical standard state, the chemical standard state, or both. a. ΔGb. Constant value for Mg+2c. PH7d. Temperature is 25°Ce. Intial concentration of reactants and products is 1Mf. Pressure is 1 atm.