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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def energy_at_conditions(self, pH, V):
 """ Get free energy for a given pH and V Args: pH (float):
 pH at which to evaluate free energy V (float):
 voltage at which to evaluate free energy Returns: free energy at conditions """

        return self.energy + self.npH * PREFAC * pH + self.nPhi * V