Question from Physitheist:
I’m going to start this by saying that I’m a Christian, but also someone who believes in science…Here’s my question. According to the laws of thermodynamics energy moves to heat. Also there is no process that is truly reversible because we can not reach absolute zero, and the process would take infinite time. Since entropy continues to increase, and there is a limit of mass and energy how are we here? If there is not a limit of energy and mass, then why do you think so? And if you believe that energy and mass can appear out of thin air balanced out by anti matter why haven’t we ever seen this? After all the amount of unusable heat created is enormous. So basically my question is this, given the laws of thermodynamics, if you extrapolate to the size of the universe how are we here? After all the Big Crunch theory doesn’t really solve the energy problem since no process is 100 percent efficient. We’d still only have heat since there’s no such thing as negligible when the scale is eternity.
Thank you, and have a wonderful day!
Jesus loves you!
Answer by SmartLX:
I answered a similar question in my piece The World of Leftover Energy, so you can comment on that one if you like. Here I’ll just try to address some of your specific points and questions.
If you extrapolate the laws of thermodynamics regarding entropy to account for the entire universe they need to be applied as to a closed system, because we’re not aware of any energy leaving the universe. A hypothetical Big Crunch takes all the matter and energy there has ever been and jams it back together in a singularity – even the “lost” energy that’s been radiated outwards throughout the history of the compressed universe. That could actually achieve 100% efficiency through recycling, as literally no energy would be lost and the singularity could behave exactly the same as the previous singularity.
There is most likely a finite amount of matter and energy in THIS universe. If it’s the only universe, an eternal existence would have to depend on some form of reclamation, like the Big Crunch, or an exponential decrease that never hits zero, like I describe in the other piece. If there are other universes, as many have theorised and some evidence actively suggests, then it’s very possible that the total matter and energy in the multiverse is infinite, and entropy doesn’t mean much on the grand scale. I don’t feel the need to declare one or the other scenario more likely. An eternal universe isn’t certain in the first place, but a non-eternal universe doesn’t guarantee an eternal creator god.
Think about what would happen if a small group of matching matter and antimatter particles suddenly emerged naturally somewhere on Earth, and therefore in an environment saturated with existing particles of matter (e.g. air, water or earth). The antimatter would be annihilated by the existing matter in an instant, and the matter it touched would also be annihilated, so you’d be left with no antimatter and exactly the amount of matter you started with. It could be happening all around us and we’d never detect it without precise instruments. This isn’t proof that it happens, but it makes it impossible to say that it isn’t happening.
Question from Physitheist: