An inventor claims to have perfected an engine that will produce energy by absorbing heat from a fuel at 300 °C and rejecting heat to the surroundings at 15 °C while achieving a thermal efficiency of...

Second law of thermodynamics:

write your soln. near and complete and explain the claims. THANK YOU!

Please answer it in 30 mins. ASAP

Extracted text: An inventor claims to have perfected an engine that will produce energy by absorbing heat from a fuel at 300 °C and rejecting heat to the surroundings at 15 °C while achieving a thermal efficiency of 60 percent. How would you evaluate his claims?