- #1
trelek2
- 88
- 0
Consider the following cyclic process:
Each cycle 800J of Energy is transferred from a reservoir at 800K and 600J of energy from a reservoir at 600K. 400J of heat is rejected to a reservoir at 400K and 1000J of work is done.
I think that the process doesn't violate the first or second laws of thermodynamics:
1st law: dU= dQ+dW
The internal energy of the system is constant: dU= 600+800-1000-400 = 0 so first law is not violated.
2nd law: Taking the Kelvin Planck statement: The engine not only extracts heat from a source and turns it into work but also has to pass some heat on to a colder reservoir, therefore I think that the second law is also not violated.
If I'm mistaken please correct me. If I'm not please reassure me that my logic is correct.
Each cycle 800J of Energy is transferred from a reservoir at 800K and 600J of energy from a reservoir at 600K. 400J of heat is rejected to a reservoir at 400K and 1000J of work is done.
I think that the process doesn't violate the first or second laws of thermodynamics:
1st law: dU= dQ+dW
The internal energy of the system is constant: dU= 600+800-1000-400 = 0 so first law is not violated.
2nd law: Taking the Kelvin Planck statement: The engine not only extracts heat from a source and turns it into work but also has to pass some heat on to a colder reservoir, therefore I think that the second law is also not violated.
If I'm mistaken please correct me. If I'm not please reassure me that my logic is correct.