dear atul
entropy – a thermodynamic quantity representing the unavaliability of systems thermal energy for conversion into mechanical work . or u can say the degree of disorder or randomness .
enthalpy – a thermodynamic quantity representing total heat content of a system, it is equal to internal enrgy + pressure * volume .
internal enrgy – the energy arising from the position and interaction of the particles and molecules inside it .
gibbs free energy = a thermodynamic quantity equals to the enrthalpy – ( enthalpy * absolute temp )
HOPE IT CLEARS
REGARDS