Simplify the following text for a Grade 13 native English-speaking person.
Original: The first explicit statement of the first law of thermodynamics was given by Rudolf Clausius in 1850 : `` There is a state function E , called ` energy ' , whose differential equals the work exchanged with the surroundings during an adiabatic process . ''
Simplified: `` There is a state function E , called â energyâ , whose differential equals the work exchanged with the surroundings during an adiabatic process . ''