The HessLawSolver class is a Python implementation of Hess's Law, a fundamental principle in chemistry. Hess's Law states that the sum of the enthalpies of the reactants equals the sum of the enthalpies of the products. It is used to predict the enthalpy change of a reaction without experimental data.

This class takes the enthalpies of formation of the reactants and products as input and calculates the enthalpy change of the reaction.

The OES class is designed to handle the core functionality of the online examination system. It takes in inputs and targets as parameters and provides methods to parse and solve the inputs.

• __init__(self, inputs, target): This is the constructor method for the OES class. It initializes the class with the provided inputs and target.

• parse(self, input): This method is used to parse the input into reactants and productions. It returns a dictionary containing the parsed input.

• solve(self): This method is used to solve the system of equations derived from the inputs. It returns the heat, solution, and a boolean indicating whether the solution is valid or not.

import OES

this is a simple example to how enter the equations.

2 H2O2 = 2 H2O + O2 -> -196

and in this way enter the target equation.

H2 + O2 = H2O2

Note : put a space between the elements and coefficients

solver = OES.OES(inputs, target)

heat, solution, flag = solver.solve()

if flag == False: 
    print('The equations don\'t have a solution') 
else: 
    print('The equation coeffient:', solution)
    print(f'The target equation heat: {heat}')

Please note that this is a basic overview of the OES class. For more detailed information, please refer to the source code.