Answer:
Clausius inequality is defined as, it applies in the cycle of real engine and there is negative entropy change. When the entropy given in the cycle during the environment is larger than entropy transferred into heat engine from hot reservoir. As, entropy of reversible system are zero.
Clausius Inequality is defined as:
[tex]R_2-R_1> \oint_{T_1}^{T_2}\frac{dQ}{T}[/tex]
Where R1 and R2 are not be equal.